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
In a case of dysfunctional uterine bleeding thehormone which is usually deficient is : 
Select and explain. 
A. Oestrogen, B. Progesterone, C. Thyroxin, D. A.C.T.H.
B: Progesterone
Answer: B: Progesterone 
Explanation: Progesterone