This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Watson and Crick are associated with - 
Select and explain. 
A. Discovery of helical structure of DNA, B. Association of Helicobacter pylon 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: They proposed the double hellical model of DNA