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: Gynaecology & Obstetrics
Commonest cause of carcinoma endometrium is: 
Select and explain. 
A. Unopposed estrogen, B. Multiple sex paner, C. Early marriage, D. Early menarche
A: Unopposed estrogen
Answer: A: Unopposed estrogen 
Explanation: Unopposed estrogen