Correct Answer: (a) United States of America
Solution:Norman Ernest Borlaug was born on 25 March 1914 in Cresco, Iowa, U.S. He took up an agricultural research position in Mexico, where he developed semi-dwarf, high- yield, disease-resistant wheat varieties. During the mid-20th century, Borlaug led the introduction of these high-yielding varieties combined with modern agricultural production techniques to Mexico, Pakistan, and India. He is one of seven people to have won the Nobel Peace Prize, the Presidential Medal of Freedom and the Congressional Gold Medal. He was also awarded the Padma Vibhushan, India's second highest civilian honor in 2006.