Which institution is the scientific custodian of Indian Standard Time?

The correct answer is 180 days. The Rules were notified by the Department of Consumer Affairs on 27 August 2026 and published in the Official Gazette on 29 August 2026, and the release states that they take effect 180 days from the date of that publication. The gap gives telecommunications networks, financial systems, power grids, transport operators, data centres and government information systems time to synchronise with a traceable source before the legal obligation begins. Options A, B and D are not mentioned anywhere in the release and are offered only as plausible commencement periods, since Indian rules are often brought into force after thirty or ninety days. Note the two dates carefully as well, because notification and Gazette publication fall two days apart, and the 180-day count runs from publication rather than from the day the Rules were signed.

The correct answer is five. CSIR-NPL, ISRO and the Legal Metrology Department jointly established secondary timescales at Regional Reference Standard Laboratories in Ahmedabad, Bengaluru, Bhubaneswar, Faridabad and Guwahati. Each of these stays continuously traceable to the IST that CSIR-NPL maintains, which together creates a distributed national architecture for spreading the time. The point of spreading it is resilience: if dissemination depended on a single location, one failure would leave the country without a traceable reference. The five laboratories, along with ISRO's NavIC satellite system and the time dissemination infrastructure of NPL and NIC, add capacity and geographical diversity. Options A, C and D are not supported by the release. A memory aid is that the cities are spread across the west, south, east, north and north-east of the country.

The correct answer is NavIC. CSIR-NPL provides traceability of Indian Standard Time to ISRO for the NavIC system, which allows the time to be spread by satellite and strengthens both the availability and the resilience of national timing services. The release lists NavIC alongside network-based routes such as NTP and PTP, and optical fibre technologies such as White Rabbit that are still under testing. Option A, GAGAN, is an Indian satellite-based augmentation system used mainly to improve navigation accuracy for civil aviation, and it is not named here. Options C and D name the European and Russian global navigation satellite systems, which are foreign systems and have no role in disseminating India's legal time. For examinations, link the three routes to their carriers: NTP and PTP over networks, NavIC by satellite, White Rabbit over fibre.

The correct answer is Mansukh Mandaviya, the Union Minister of Labour and Employment and of Youth Affairs and Sports, who chaired the first day of the conference. Option A, Shobha Karandlaje, is the Minister of State for Labour and Employment and for Micro, Small and Medium Enterprises, and she was present at the same session but did not chair it, which makes her the closest distractor. Option C, Dr Chandra Bhushan Kumar, is the Secretary in the Ministry of Labour and Employment, and he delivered the opening remarks on the second day, where he spoke about the skill ecosystem, the dignity of labour, worker mobility across states and borders, occupational health and the greater use of actuarial analysis in designing welfare measures. Option D names a minister holding a different portfolio. Keeping the minister, the minister of state and the secretary apart is the whole point of a question like this.

The correct answer is Rajasthan. In the session on the roles and responsibilities of BOCW Welfare Boards in the light of the new labour codes, several States and Union Territories presented their own initiatives. Rajasthan spoke about its Digital Labour Chowks, which take the traditional gathering point where daily wage workers wait for work and give it a digital form so that workers and employers can find each other more easily. Option A, Uttar Pradesh, presented its work on skill development of building workers. Option B, Bihar, highlighted the Shram Seva Suvidha Kendras. Option D, Assam, presented the Nirman Sakhi Portal. All four are genuine presentations from the same session, which is exactly why this question is worth preparing as a matching set rather than as a single fact.