Kakinada, which uses RFID tags and facial recognition attendance in waste management, is a city of which state?

The correct answer is Ghaziabad. The municipal corporation of this city in Uttar Pradesh has registered for an international carbon credit project verified by the United Nations and has been accredited under the Verified Carbon Standard, which is supported by the United Nations Framework Convention on Climate Change. Following Indore in Madhya Pradesh, it is set to become the first urban local body in its own state and the second in the country to convert waste into a new source of value. Options A, C and D name other large cities of the same state, but none of them is the body described as taking this step. Candidates should hold two names together for this fact, Indore as the first and Ghaziabad as the second, along with the standard under which the accreditation was granted.

The correct answer is Goa. The facility at Saligao is operated by the Goa Waste Management Corporation and stands on land that was once used as a garbage dump. It is spread over an area of 113,000 square metres and manages 250 metric tons of wet and dry waste each day, recovering recyclables from 100 metric tons of dry waste and sending the remainder to cement factories for co-processing. Organic matter is separated and converted into biogas, which in turn generates electricity for the neighbourhood, and the plant produces 7 to 8 tons of compost a day for use by local panchayats in gardening and reforestation. Options A, B and D name other states along or near the western coast, but the facility described here belongs to Goa and treats close to a third of the waste generated in that state.

The correct answer is India's Wildlife Week. The release of the tigress in Buxa Tiger Reserve was described as a fitting beginning to Wildlife Week in the country, and it coincided with the start of the phased Tiger Reintroduction Programme for the reserve. Option B, National Forest Martyrs Day, honours those who died protecting forests and wildlife and is a separate observance that has no connection with this release. Option C, World Nature Conservation Day, is an international observance and not the occasion named here. Option D is not an observance at all; a wildlife census is an exercise in counting animals rather than a week marked in the calendar, and the monitoring described for this tigress uses telemetry, camera trapping and field observation to follow one animal. Pair the release with Wildlife Week and with the reserve's first reintroduction phase.

The correct answer is Valmiki Tiger Reserve, Bihar. The tigress, identified as T138, was moved from Valmiki in Bihar to Buxa in West Bengal after ecological, veterinary and management parameters had been assessed and the laid-down protocols followed, and the Environment Minister thanked the Bihar Chief Minister for the state's support in the translocation. Option A, Manas Tiger Reserve in Assam, is a plausible distractor because a tiger photographed at Buxa by camera traps was matched with a Manas animal, but that was evidence of natural movement across the landscape and not the source of this release. Option C, the Sundarbans, lies in the same state as Buxa and is not mentioned as the source at all. Option D, Kanha, is a well-known reserve of Madhya Pradesh that has no part in this programme. The pairing to remember is Valmiki in Bihar as the source and Buxa in West Bengal as the destination.

The correct answer is 1983. Buxa, long regarded as an important tiger landscape of North Bengal, was given the status of a Tiger Reserve in that year, and it forms part of a larger ecological unit connected to forests and protected areas in Bhutan and Assam. Option A is a tempting choice because it is the year associated with the launch of India's national tiger programme, but Buxa was not among the reserves notified at that point. Option C does not correspond to any milestone named for the reserve. Option D, 2018, is the year from which the Tiger Augmentation and Recovery Project has been carried out jointly by the Government of West Bengal with the National Tiger Conservation Authority and the Wildlife Institute of India, so it marks the start of the recovery effort rather than the notification of the reserve. Keeping these two years apart is the key to this item.