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
Oral combined contraceptive pills contain which one of the following sets of hormone : 
Select and explain. 
A. Ethinyl oestradiol. progestrogen and oestrone, B. Progestrogen and Ethinyl oestradiol, C. Progestrogen and oestrone, D. Oestrone and ethinyl oestradiol
B: Progestrogen and Ethinyl oestradiol
Answer: B: Progestrogen and Ethinyl oestradiol 
Explanation: Progestrogen and Ethinyl oestradiol