This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
Watson and Crick are associated with 
Select and explain. 
A. Discovery of helical structure of DNA, B. Association of Helicobacter pylori with chronic gastritis, C. Discovery of HIV virus, D. None of the above
A: Discovery of helical structure of DNA
Answer: A: Discovery of helical structure of DNA 
Explanation: Ans. (a) Discovery of helical structure of DNA(Ref: Emery genetics)Francis Harry Compton Crick, James Dewey Watson and Maurice Hugh Frederick Wilkins were awarded the 'Nobel Prize' in 1962 "for their discoveries concerning the molecular structure of nucleic acids and its significance for information transfer in living material".