This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrine Control of the Menstrual Cycle, Subject name: Gynaecology & Obstetrics
Enzyme responsible for conversion of androgen into estrogen - 
Select and explain. 
A. Aromatase, B. Sulphatase, C. Fumarase, D. 3 beta hydroxy steroid dehydrogenase
A: Aromatase
Answer: A: Aromatase 
Explanation: Ans. is 'a' i.e., Aromatase o Estradiol is the major estrogen secreted by the ovary.o It is synthesized in the graffian follicle, corpus luteum and placenta from cholesterol.o Estradiol is rapidly oxidized in liver to estrone which is hydroxylated to form estriol.