In January 2022, who became India's first UNDP youth climate champion?

Correct option is A

The correct answer is: (a) Prajakta Koli
In January 2022, Prajakta Koli, a popular YouTuber and social media influencer, was appointed as India's first UNDP Youth Climate Champion.

•  Prajakta Koli is a well-known YouTuber and social media influencer who runs the channel "Mostlysane".
  
•  As a Youth Climate Champion, Prajakta Koli aims to encourage young people to take action on climate change and help in creating a more sustainable future.