Concept:Sports current affairs question based on the winner of the men's singles title at the Australian Open 2020.
Explanation:The final of the 2020 Australian Open men's singles category was played at Melbourne Park.
Novak Djokovic faced Dominic Thiem in the final and defeated Thiem in a tough five set match.
With this victory, Djokovic won his eighth Australian Open singles title.
Dominic Thiem finished as the runner-up of the tournament.
Rafael Nadal and Roger Federer were eliminated in earlier rounds, so neither of them could win the title.
Therefore, among the given options, Novak Djokovic is the correct choice for the year 2020.
Answer:Option C, Novak Djokovic.