This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
Nitric oxide produces its anti-aggregatory action by increasing the levels of 
Select and explain. 
A. cAMP, B. cGMP, C. ADP, D. Phosphoinositol
B: cGMP
Answer: B: cGMP 
Explanation: nitric oxide has major side effects that are mediated by activation of cytoplasmic soluble guanyl cyclase and stimulate the production of cGMP, an impoant 2nd messenger REF: ESSENTIALS OF MEDICAL PHARMACOLOGY: KD TRIPATHI:7TH EDITION;PAGE NO 103