This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'NO acts on platelets through ? \nSelect and explain. \nA. cAMP, B. Adenosine, C. cGMP, D. TX-A2', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., cGMP", 'role': 'assistant'}]