Explanation:

- Option 1: Amit Shah

- Amit Shah, the Union Home Minister of India, inaugurated the 'Bharat Darshan Park' in Delhi in December 2021. This park features replicas of major monuments from across India, crafted by talented artists.

- Option 2: Dharmendra Pradhan

- Dharmendra Pradhan was serving as the Minister of Education and Skill Development and Entrepreneurship in December 2021. His role did not involve the inauguration of the Bharat Darshan Park.

- Option 3: Nirmala Sitharaman

- Nirmala Sitharaman is the Finance Minister of India as of December 2021. She was not involved in the inauguration of the Bharat Darshan Park.

- Option 4: Smriti Irani

- Smriti Irani was serving as the Minister of Women and Child Development in December 2021. Inaugurating the Bharat Darshan Park was not part of her responsibilities.

Option 1: Amit Shah is the correct answer.