This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous Questions, Subject name: Medicine
Smoking causes all cancers except: 
Select and explain. 
A. Carcinoma endometrium, B. Oral cancer, C. Kidney cancer, D. Bladder cancer
A: Carcinoma endometrium
Answer: A: Carcinoma endometrium 
Explanation: There does not appear to be a casual link between cigarette smoking and cancer endometrium. Smoking DOES NOT cause primary brain cancer. Kidney, oral cancer and bladder cancer are associated with smoking.