Explanation:

- Option 3: Bhavya Lal

- Correct Answer: Bhavya Lal was appointed as the acting chief of staff of NASA in February 2021. She played a significant role in an executive capacity at NASA, contributing her expertise in space policy and technology. Before her appointment at NASA, she had an accomplished career as a researcher and policy expert, holding key positions that influenced space strategy and operations.

- Option 1: Shantanu Narayen

- Shantanu Narayen is the CEO of Adobe, a leading multinational computer software company. He is known for his efforts in transforming Adobe into a highly successful and innovative company, but he has no announced affiliation with NASA.

- Option 2: Ramesh Raskar

- Ramesh Raskar is an associate professor at the MIT Media Lab renowned for his work in imaging technologies and social-impact initiatives. He has not held the position of acting chief of staff at NASA.

- Option 4: Manmohan Attavar

- Manmohan Attavar is not a widely recognized figure in relation to NASA. Known in different fields, he has no recorded involvement as acting chief of staff of NASA.