This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
Oral contraceptive pills give protection against 
Select and explain. 
A. STDs, B. Breast cancer, C. Ovarian cancer, D. Hepatocellular carcinoma
C: Ovarian cancer
Answer: C: Ovarian cancer 
Explanation: Ref:Park's Text book of Preventive and Social Medicine 25th ed