Which enzyme converts androgen to estrogen?-

Ans. is 'b' i.e., Aromatase* Aromatase is an enzyme located in the endoplasmic reticulum of gonads, adipose tissue and placenta* It helps in the conversion of androgen into estrogen. It converts androstenedione to estrone and testosterone to estradiol* This conversion is done by three successive hydroxylation and by removal of methyl group as formate and by aromatization of the A ring