RRB Group D GK Questions 2026

The Sulbasutras are appendices to the Shrauta Sutras and give the geometrical rules for laying out the brick altars of Vedic sacrifice, including the construction of squares and rectangles of a given area and the statement that the square on the diagonal equals the sum of the squares on the…

The Sushruta Samhita is the classical manual of shalya chikitsa or surgery, describing surgical instruments, the removal of the cataract, the setting of fractures, the stitching of wounds and the rebuilding of a severed nose, for which Sushruta is remembered as the father of surgery and of plastic surgery.

Bhaskara II, also called Bhaskaracharya, wrote the Siddhanta Shiromani in 1150 CE in four parts, of which Lilavati deals with arithmetic, mensuration and problems of everyday calculation, Bijaganita with algebra, and Grahaganita and Goladhyaya with astronomy.

Brahmagupta composed the Brahmasphutasiddhanta in 628 CE, in which he treated zero as a number and not merely as a placeholder and gave rules for adding, subtracting and multiplying positive and negative quantities, which he called fortunes and debts; he also wrote the Khandakhadyaka and argued that bodies fall because…

Aryabhata, born in 476 CE, wrote the Aryabhatiya in 499 CE in four sections: the Gitikapada on units of time and the large astronomical cycles, the Ganitapada on mathematics, the Kalakriyapada on the reckoning of time and planetary positions, and the Golapada on the celestial sphere.

K2, 8,611 metres, also called Godwin Austen, is the highest summit of the Karakoram range of the Trans-Himalayan belt and lies in the part of Jammu and Kashmir under illegal occupation, which is why it is often given as the highest point in Indian territory as claimed.

Mullayanagiri, 1,930 metres, in the Baba Budan range of the Chikkamagaluru district, is the highest peak of Karnataka and of the Western Ghats within that state, and the range is also called Chandra Drona.

Sandakphu, 3,636 metres, on the Singalila ridge in the Darjeeling district, is the highest point of West Bengal and a well-known viewpoint from which the Kangchenjunga massif and, in clear weather, Everest itself can be seen.

Phawngpui, 2,157 metres, in the Lushai or Mizo hills, is the highest point of Mizoram, is known as the Blue Mountain, and gives its name to the Phawngpui National Park, also called the Blue Mountain National Park.

Saramati, 3,826 metres, is the highest peak of Nagaland and of the Naga hills, and it stands on the boundary between Nagaland and Myanmar in the Purvanchal or eastern hill belt, which runs from the Patkai Bum through the Naga, Manipur and Mizo hills.

Doddabetta, 2,637 metres, is the highest summit of the Nilgiri hills and of Tamil Nadu, and it overlooks Udhagamandalam, that is Ooty; the Nilgiris are the meeting place of the Western Ghats, the Eastern Ghats and the Anaimalai, and the Nilgiri Biosphere Reserve was the first biosphere reserve of India.

Reo Purgyil, 6,816 metres, stands in the Kinnaur district of Himachal Pradesh on the Zanskar range near the border with Tibet, and it is the highest point of the state.

Dhupgarh, about 1,350 metres, rises above Pachmarhi in Madhya Pradesh and is the highest point of the Satpura range and of the state; Pachmarhi is the only hill station of Madhya Pradesh and lies within a biosphere reserve.

Guru Shikhar, 1,722 metres, stands on Mount Abu in the Sirohi district of Rajasthan and is the highest point both of the state and of the Aravalli, the oldest fold mountain system of India; Mount Abu is also the only hill station of Rajasthan.

Anamudi, 2,695 metres, in the Anaimalai hills of Kerala, is the highest peak of the Western Ghats and of the whole of peninsular and south India, and it stands inside the Eravikulam National Park, the chief home of the Nilgiri tahr.

Kangchenjunga rises to 8,586 metres on the border between Sikkim and Nepal and is the third highest mountain in the world after Everest and K2; its name means the five treasures of snow, and the Kangchenjunga National Park around it was inscribed on the UNESCO World Heritage List in 2016.

Nanda Devi, 7,816 metres, in the Garhwal Himalaya of Uttarakhand, lies wholly inside Indian territory and is therefore the highest peak entirely within India.

Nephology is the study of clouds, their formation, classification into types such as cirrus, cumulus and stratus, and their part in rainfall, and it is a branch of meteorology, the science of the atmosphere and the weather.

Herpetology is the study of reptiles such as snakes, lizards, crocodiles and turtles, together with amphibians such as frogs, toads and salamanders, and in India it includes the work on snake venom and antivenom at institutions that maintain snake parks.

Phycology, also called algology, is the study of algae, the simple photosynthetic organisms that range from the single-celled Chlamydomonas to the large brown seaweeds, and it covers their classification and their uses as food, fertiliser and a source of agar.