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
Which of the following OCP's have the least amount of estrogen: 
Select and explain. 
A. Mala N, B. Triquilar, C. Femilon, D. Novelon
C: Femilon
Answer: C: Femilon 
Explanation: None