RRB Group D GK Questions 2026

The correct answer is B, the Palk Strait and the Gulf of Mannar, the shallow waters between Tamil Nadu and Sri Lanka, with the chain of sandbanks called Adam's Bridge or Rama Setu running between Rameswaram and Talaimannar.

The line was drawn at the Simla Convention of 1914 by Sir Henry McMahon, then the Foreign Secretary of British India, in an agreement with Tibet; China has never accepted it, which is the root of the dispute in that sector.

The line was drawn in 1947 by Sir Cyril Radcliffe, who chaired the boundary commissions that divided Punjab and Bengal, so the same line also forms the India-Bangladesh boundary, Bangladesh having been East Pakistan until 1971.

The correct answer is B, Afghanistan, with which India's land boundary is only about 106 kilometres long, lying in the part of the former state of Jammu and Kashmir that is under Pakistan's control, near the Wakhan Corridor.

The correct answer is C, Bangladesh, with a boundary of about 4,096 kilometres, the longest India has with any country; it runs along West Bengal, Assam, Meghalaya, Tripura and Mizoram.

The correct answer is A, China, which was never a British territory and is therefore not a member of the Commonwealth of Nations, so it does not take part in the Commonwealth Games.

Nepal touches five Indian states, namely Uttarakhand, Uttar Pradesh, Bihar, West Bengal and Sikkim, so options A, B and C are all genuine Nepal border states and only Assam is not.

Of the four countries offered here Bhutan is by far the smallest, a landlocked Himalayan kingdom whose border with India runs about 699 kilometres along Sikkim, West Bengal, Assam and Arunachal Pradesh.

India has a land boundary with Pakistan, Afghanistan, China, Nepal, Bhutan, Bangladesh and Myanmar.

The Sweet Revolution is the term used for the drive to raise honey production and beekeeping in India, supported by the National Beekeeping and Honey Mission.

The correct answer is B, Jharkhand, the leading lac producing state of India, which also explains why the country's lac research institute stands at Namkum near Ranchi.

The silkworm's silk gland secretes a protein called fibroin, and over it a second protein, sericin, which acts as a gum and hardens the cocoon; boiling the cocoon softens the sericin so the filament can be reeled, and removing it afterwards is called degumming, which gives silk its lustre and…

The Central Silk Board was constituted under the Central Silk Board Act, 1948 and works under the Ministry of Textiles with its headquarters in Bengaluru, from where it runs the country's sericulture research and seed organisation.

The correct answer is D, castor, which is the host of the eri silkworm and has nothing to do with lac culture.

The correct answer is A, Kerria lacca, earlier named Laccifer lacca, a tiny scale insect whose female settles on the twigs of a host tree, sucks its sap and secretes the resin we call lac.

The correct answer is A, Karl von Frisch, who decoded the dance language of bees: a round dance for a source near the hive and a waggle or tail-wagging dance for a distant one, in which the angle of the straight run shows the direction of the food relative to…

The queen can lay both fertilised and unfertilised eggs; the unfertilised ones develop into haploid males called drones, a form of parthenogenesis, while fertilised eggs give rise to diploid females.

The correct answer is C, Apis dorsata, the rock bee, the largest of the Indian honey bees, which builds a single huge comb on cliffs and tall buildings and yields the most honey per colony, yet is fierce and cannot be kept in hives.

The eri silkworm, Samia ricini, feeds on castor leaves, and its silk is called ahimsa silk because the moth is allowed to emerge before the cocoon is used, leaving a broken fibre that is spun like cotton instead of being reeled.

Muga silk comes from Antheraea assamensis, reared on Som and Soalu trees of the Brahmaputra valley, and Assam's muga carries a Geographical Indication tag.