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
Increased estrone levels is PCOD is derived from 
Select and explain. 
A. Testosterone, B. Androstenedione, C. Dehydro epiandrosterone, D. GnRH
B: Androstenedione
Answer: B: Androstenedione 
Explanation: Elevated androstenedione levels contribute to an increase in estrone levels through peripheral conversion of androgens to estrogens by aromatase.