The First Union Territory of India to run 100 percent on solar energy is

1. A

   Andaman-Nicobar

   Andaman and Nicobar Islands use a mix of diesel and growing renewables; they were not notified as the first Union Territory running 100 percent on solar in the 2018–19 claims this paper uses.

2. B

   Chandigarh

   Chandigarh has solar rooftop programmes but was not the first UT declared 100 percent solar-powered in that round.

3. C

   Diu

   Diu (then part of Daman and Diu) was widely reported in 2018 as the first Union Territory to meet its daytime conventional power need from solar and to run on 100 percent solar energy in the exam’s sense. That is the official key.

4. D

   Puducherry

   Puducherry was not that first 100 percent solar UT.

Summary. Official key is (c) Diu. In 2018 Diu was billed as India’s first UT to go 100 percent solar for its power need. The other UTs were not given that first-mover tag.