Explanation:

Anandwan is a community rehabilitation center for leprosy patients and the disabled, founded by the renowned social activist Baba Amte in $1949$. It is located in Warora, Maharashtra, India, and has been instrumental in providing care and vocational training to its residents. - Option A (Baba Amte): Baba Amte was a dedicated social worker who established Anandwan to empower and rehabilitate individuals affected by leprosy and other disabilities. This is the correct answer. - Option B (Rajiv Gandhi): Rajiv Gandhi was a former Prime Minister of India, known for his political contributions and leadership, not for founding Anandwan. - Option C (Mahatma Gandhi): Mahatma Gandhi was the leader of the Indian independence movement, known for his philosophy of nonviolent resistance. He did not found Anandwan. - Option D (Anna Hazare): Anna Hazare is an Indian social activist known for his anti-corruption movements and rural development efforts, but he did not found Anandwan.