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: Pharmacology
Which of the following anticholinergic is used for peptic ulcer disease 
Select and explain. 
A. Dicyclomine, B. Methacoline, C. Pirenzepine, D. Aclidinium
C: Pirenzepine
Answer: C: Pirenzepine 
Explanation: Pirenzepine is a M1 receptor antagonist.
Acetyl choline acts on M1 receptors present on gastric glands to increase acid secretion and Pirenzepine is used to treat peptic ulcer disease by blocking these receptors.