The correct option is D Mandayam O.P. Iyengar
The study of algae is called phycology or algology.
Mandayam O.P. Iyengar is remembered as the 'father of Indian phycology'.
Salim Ali is known as the 'birdman of India'.
M.S. Swaminathan served in designing and leading the green revolution in India. He is also known as the 'father of the green revolution'.
Founder of Amul, Verghese Kurien is named as the 'father of the white revolution in India'.