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
Estrogen in the OCP causes all the following except : 
Select and explain. 
A. Carcinoma in situ cervix, B. Breast carcinoma, C. Endometrial carcinoma, D. Thromoembolism
A: Carcinoma in situ cervix
Answer: A: Carcinoma in situ cervix 
Explanation: Carcinoma in situ cervix