This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asthma, Subject name: Pharmacology
[{'content': 'Tadalafil acts on Phosphodiesterase 5 and causes accumulation of- \nSelect and explain. \nA. cAMP, B. cGMP, C. PAF, D. IL10', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b'i.e., cGMP o Inhibition of PDE-5 prevents degradation of cGMP which results in accumulation of cGMP and marked potentiation of NO action - Relaxation of smooth muscle in corpus cavemosum and blood vessels supplying it - Erection of penis,o Drugs are : -SiledenafilTodafilVardenafil", 'role': 'assistant'}]