Answer : 4. "पुष्कर सिंह धामी"
Explanation :

BJP MLA Pushkar Singh Dhami was sworn in as the new Chief Minister of Uttarakhand on 3 July 2021. Dhami has volunteered at Rashtriya Swayamseva Sangh (RSS) and was a member of the Akhil Bharatiya Vidyarthi Parishad (ABVP) for 10 years. He was also the state President of Bharatiya Yuva Morcha (BJYM) from 2002-2008.