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
Pyometra commonly occurs following: 
Select and explain. 
A. Carcinoma endometrium, B. Carcinoma cervix, C. Carcinoma urethra, D. Senile endometritis
A: Carcinoma endometrium
Answer: A: Carcinoma endometrium 
Explanation: None