First Field Marshal of India was:

The correct answer is Option (2) → General SHFJ Manekshaw

Field Marshal is the highest rank of the Indian Army, a five-star rank given for life. Sam Manekshaw (Sam Hormusji Framji Jamshedji Manekshaw), Army Chief during the 1971 war that led to the creation of Bangladesh, was the first to hold it, from 1 January 1973. The only other officer given the rank is K M Cariappa, the first Indian Commander-in-Chief, in 1986.