Explanation:

- Correct Answer: Option 4: Prasoon Joshi

- Prasoon Joshi was the Chairperson of the Central Board of Film Certification (CBFC) as of January 2021. He took over the position in August 2017 and is a well-known Indian lyricist and screenwriter.

- Option 1: Asha Parekh

- Asha Parekh is a renowned Indian actress, director, and producer. Though she has been associated with various film and television roles, she was not the Chairperson of the CBFC in January 2021.

- Option 2: Shekhar Kapoor

- Shekhar Kapur is an acclaimed filmmaker, known for movies like "Masoom" and "Bandit Queen." He has not served as the Chairperson of the CBFC.

- Option 3: Rekha

- Rekha is a legendary actress in Indian cinema, recognized for her work in numerous classic films. She has not been associated with the role of Chairperson of the CBFC.