Which Indian scientist won the Nobel prize in 1968 for demonstrating how the nucleotides in nucleic acid control the synthesis of proteins?

Nucleic acids are the chemical compounds that have the ability to break down into phosphoric acids, sugars and other organic bases. Nucleic acids are the building blocks of nucleotides that in turn form the genetic material present in the cell. This genetic material can either be DNA or RNA. Dr. Har Gobind Khorana was an Indian biochemist who demonstrated that the nucleic acids present in nucleotides are responsible for the process of protein synthesis. This process occurs when the different codons present in the DNA and RNA molecules code for specific proteins which are then made in the ribosomes. 

Hence, the correct option is D.