This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Genetics, Subject name: Biochemistry
[{'content': 'What is the contribution of this scientist to molecular genetics? \nSelect and explain. \nA. Chemical synthesis of ribonucleotide, B. Sequencing of amino acid, C. Base pairing rule, D. Structure of DNA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Chemical synthesis of ribonucleotide* The scientist given in picture is Har Gobind Khorana* Developed chemical method to synthesize polyribonucleotide.* This lead to the cracking of genetic code.', 'role': 'assistant'}]