Which former Finance Minister also served as the Prime Minister of India?

Dr. Manmohan Singh is the correct answer because he served as the Finance Minister of India from 1991 to 1996, during a pivotal period of economic liberalization. He played a key role in introducing reforms that transformed the Indian economy. Subsequently, he became the Prime Minister of India, serving from 2004 to 2014. His tenure as Finance Minister is particularly noteworthy for his innovative policies that laid the groundwork for India's economic growth in the following decades, and his leadership as Prime Minister further solidified his influence in Indian politics.

Other individuals mentioned also have notable political careers; for instance, P. Chidambaram served as Finance Minister and held the position multiple times but did not serve as Prime Minister. Yashwant Sinha was another prominent Finance Minister but did not become Prime Minister. Morarji Desai was a Prime Minister and had held various ministries but was not Finance Minister at the same time as the other contenders listed. Therefore, Dr. Manmohan Singh uniquely holds both titles.