This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Pirenzepine acts on which receptor? 
Select and explain. 
A. Muscarinic, B. Nicotinic, C. Alfa, D. Beta
A: Muscarinic
Answer: A: Muscarinic 
Explanation: ref; KD Tripathi pharmacology (page no;117) Pirenzepine act through muscarinic receptor it selectively blocks M1 receptor and inhibits gastric secretion without producing other atropinic side effects due to M2& M3 blockade.