Explanation:

- Nikolai Snesarev: He was appointed as the middle and long-distance coach of the Indian athletics team in January 2021. Snesarev, a Belarusian national, has been associated with Indian athletics on previous occasions too, known for his expertise and disciplined coaching style.

- Radhakrishnan Nair: He is a notable name in Indian athletics, often associated with coaching and administrative roles, but not with this specific appointment in January 2021.

- Adille Sumariwalla: He is the president of the Athletics Federation of India and not a coach. His role is more administrative and leadership-oriented within Indian athletics.

- Amrish Kumar: There are no significant records related to this name being involved in coaching the Indian athletics team in such context.