Who won the 'Nobel Prize' in the field of "physiology or medicine"?

The correct answer is Option (4) → Har Gobind Khorana

Har Gobind Khorana, born in 1922 at Raipur in undivided Punjab, shared the 1968 Nobel Prize in Physiology or Medicine with Robert W. Holley and Marshall W. Nirenberg. Their work showed how the order of bases in the nucleic acids decides the order of amino acids in a protein, that is, how the genetic code is read. Khorana worked in the United States and had become an American citizen in 1966.