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
Corpus f uteum activity is maintained by : 
Select and explain. 
A. FSH, B. LH, C. Estrogen, D. Progesterone
B: LH
Answer: B: LH 
Explanation: LH