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
NO acts on platelets through ? 
Select and explain. 
A. cAMP, B. Adenosine, C. cGMP, D. TX-A2
C: cGMP
Answer: C: cGMP 
Explanation: Ans. is 'c' i.e., cGMP