The correct answer to the question is option 2: Magnus Carlsen. Magnus Carlsen is a renowned chess player from Norway. He won the FIDE World Chess Championship in 2021. It is important to note that Magnus Carlsen is a well-known and highly respected player in the chess world. He has held the title of World Chess Champion since 2013, and his victory in the 2021 championship further cemented his reputation as one of the greatest chess players of all time. Therefore, option 2 is the correct answer to the question. It is worth mentioning that the other options listed as 1. Nepomniachtchi, 3. Ding Liren, and 4. Anish Giri are also highly skilled chess players, but they did not win the 2021 FIDE World Chess Championship.