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: Biochemistry
All are required for conversion of progesterone to estrogen except ? 
Select and explain. 
A. Lyase, B. 11-hydroxylase, C. Reductase, D. Isomerase
B: 11-hydroxylase
Answer: B: 11-hydroxylase 
Explanation: Ans. is 'b' i.e., 11-hydroxylase