Explanation:

- Viswanathan Anand (Option 2): As of January 2021, Viswanathan Anand, the Indian chess grandmaster and former world champion, was the brand ambassador for World Wildlife Fund (WWF) India’s Environment Education Programme. His involvement aimed to promote awareness and education on environmental issues among young minds and communities across India.

- Dia Mirza (Option 1): While Dia Mirza is known for her active role in environmental and wildlife conservation efforts, including being a UNEP Goodwill Ambassador, she was not the brand ambassador for WWF India's Environment Education Programme in January 2021.

- Virat Kohli (Option 3) and MS Dhoni (Option 4): Both are renowned Indian cricketers with various brand affiliations, but neither was associated with WWF India's Environment Education Programme during the specified period.

Correct Answer: Viswanathan Anand (Option 2)