This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of menstruation, Subject name: Gynaecology & Obstetrics
Average blood loss in normal menstruation 
Select and explain. 
A. 50 mL, B. 80 mL, C. 100 mL, D. 120 mL
A: 50 mL
Answer: A: 50 mL 
Explanation: The duration of menstruation is 4-5 days and the amount of blood loss estimated to be 20-80ml with an average of 35ml. Reference: D.C.DUTTA&;S TEXTBOOK OF GYNECOLOGY; 6th edition; PG NO:82