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: Forensic Medicine
Curling's ulcer common in which pa of duodenum: DNB 09; AIIMS 13 
Select and explain. 
A. 1st pa, B. 2nd pa, C. 3rd pa, D. Between 1st and 2nd pa
A: 1st pa
Answer: A: 1st pa 
Explanation: Ans. 1st pa