At which place were UCIL's Diamond Jubilee Year celebrations held?

The correct answer is the Department of Atomic Energy. UCIL is described as a public sector enterprise working under the Department of Atomic Energy, and it supplies the uranium that feeds the country's nuclear power programme. Its Diamond Jubilee Year, marked on 4 October 2026, counted six decades from its incorporation on 4 October 1967. The link with the department is visible in the jubilee programme itself: a DAE Technology Exhibition was staged for school students, and the Secretary of the Department of Atomic Energy, who is also Chairman of the Atomic Energy Commission, sent greetings. Option A, the Ministry of Mines, handles mineral administration in general but not the atomic minerals wing that UCIL belongs to. Option C, the Ministry of Coal, deals with coal and lignite and has nothing to do with uranium. Option D, the Department of Science and Technology, funds scientific research but does not own the uranium mining corporation. Only the Department of Atomic Energy fits.

The correct answer is Member-Finance, Atomic Energy Commission. Ms. Seema Jain attended the jubilee at Jaduguda in that capacity as Chief Guest, toured the Technology Demonstration Pilot Plant and the proposed site of the Dark Matter Laboratory, and described the year as a celebration of six decades of scientific capability, institutional experience and service to the nation, paying homage to Dr Homi Jehangir Bhabha and the pioneers of uranium mining in India. Option A belongs to Dr Kacham Anand Rao, who is Chairman and Managing Director of UCIL and spoke of the year as a proud marker for the UCIL family. Option B belongs to Dr Ajit Kumar Mohanty, Secretary of the Department of Atomic Energy and Chairman of the Atomic Energy Commission, who conveyed his greetings. Option D is not a post named anywhere in connection with the celebrations, though the Saha Institute of Nuclear Physics is the body planning the dark matter facility.

The correct answer is the Saha Institute of Nuclear Physics, an institution aided by the Department of Atomic Energy. The new site proposed for its Dark Matter Laboratory lies at the 815-metre level of the Jaduguda underground mine, and the Chief Guest at UCIL's Diamond Jubilee Year celebrations was taken to see it along with the Technology Demonstration Pilot Plant. A deep underground location suits such a laboratory because the rock above screens out much of the background radiation that would otherwise swamp a sensitive detector, which is why a working uranium mine offers a ready site. Option C, the Bhabha Atomic Research Centre, is the department's flagship research centre but is not named as the owner of this laboratory. Options B and D are respected research institutions in India, yet neither figures in the plan for the Jaduguda facility. The institute to remember with the 815-metre level is the Saha Institute of Nuclear Physics.

The correct answer is fifth. India has emerged as the fifth nation in the world to design and build an indigenous 4G stack of its own, a milestone the Ministry of Communications treats as proof of growing self-reliance in developing and deploying advanced telecom technology. Options A, B and D give the wrong rank and are the kind of near misses a paper setter uses when a milestone is stated as an ordinal. Along with this achievement, the figures to remember for the country's network are 1.01 billion broadband subscribers and over one billion internet subscribers, 5G services reaching 99.9 per cent of districts and 85 per cent of the population, and 4G connectivity in 98.7 per cent of villages. These numbers were cited while the arrangements for the tenth India Mobile Congress at Yashobhoomi were being reviewed, so the ordinal and the coverage figures are often asked together.

The correct answer is Yashobhoomi, Dwarka, New Delhi. The Union Minister of Communications visited this convention centre to review the final arrangements before the opening of the tenth India Mobile Congress, and the exhibition halls, sessions and investor meetings of the event are housed there. Options A, C and D name other well known venues in the national capital that host conferences and exhibitions, but none of them is the site of this edition of the congress. The distinction matters because questions on summits and expositions almost always pair the edition with its venue and its theme. For this event the three go together as follows: the tenth edition, the theme 'Scale Without Boundaries', and Yashobhoomi in Dwarka as the venue, with the Prime Minister inaugurating the congress on 8 October 2026. Only option B is therefore correct.