This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Reproductive physiology and hormones in females, Subject name: Gynaecology & Obstetrics
Granulosa cells produce estrogen with the help of the enzyme : 
Select and explain. 
A. Alkaline phosphatase, B. Aromatase, C. Acid phosphate, D. Glucuronidase
B: Aromatase
Answer: B: Aromatase 
Explanation: During the follicular phase under the influence of LH, androgens are produced in the theca cells. The androgens diffuse into granulosa cells where they are aromatised to estradiol androgens-> aromatase -> estradiol and estrone, under FSH influence. Ref: D.C. Dutta's Textbook of Gynaecology, 6th edition, page no: 72