This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology metabolism, Subject name: Physiology
Inhibin-A is produced by? 
Select and explain. 
A. Sertoli cell, B. Leydig cell, C. Hilus cell, D. Placenta
D: Placenta
Answer: D: Placenta 
Explanation: Ans. D PlacentaRef: Ganong, 25th ed. pg. 409, 425:* Inhibin A is produced by placenta and corpus luteum. It is used in quadruple screening for prenatal detection of down Syndrome.* Inhibin B inhibits FSH in both males and females. It is produced by Sertoli cells in male and granulosa cells in female.