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: Physiology
Major function of dihydrotestosterone? 
Select and explain. 
A. Spermatogenesis, B. Development of male external genitalia, C. Erythropoiesis, D. Development of male internal genitalia
B: Development of male external genitalia
Answer: B: Development of male external genitalia 
Explanation: Ans. is 'b' i.e., Development of male external genitalia.