Dr. Zakir Hussain was

first vice president of India
first speaker of Lok Sabha
the first Muslim president of India
first president of Indian National Congress

Dr. Zakir Hussain was the third president of India. He was the first Muslim to hold the office. He was also the first vice president of India. He was a scholar and educationist who served as the vice chancellor of Aligarh Muslim University from 1928 to 1948. He was a member of the Constituent Assembly of India and played a key role in drafting the Constitution of India. He was also a member of the Rajya Sabha from 1952 to 1956.

A. First vice president of India: This is incorrect. The first vice president of India was Dr. Radhakrishnan.
B. First speaker of Lok Sabha: This is incorrect. The first speaker of Lok Sabha was G.V. Mavalankar.
C. The first Muslim president of India: This is correct. Dr. Zakir Hussain was the first Muslim president of India.
D. First president of Indian National Congress: This is incorrect. The first president of Indian National Congress was W.C. Bonnerjee.