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: Surgery
Commonest site of peptic ulcer perforation ? 
Select and explain. 
A. Anterior aspect of the first pa of duodenum, B. Posterior aspect of the 1st pa of duodenum, C. Greater curvature of the stomach, D. Lesser curvature of the stomach
A: Anterior aspect of the first pa of duodenum
Answer: A: Anterior aspect of the first pa of duodenum 
Explanation: Ans. is 'a' i.eAnterior aspect of the first pa of duodenum