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
Polymenorrhoea Means:a) Menses < 21 days b) Menses >35 daysc) Painful mensesd) DUB 
Select and explain. 
A. b, B. c, C. ad, D. ab
C: ad
Answer: C: ad 
Explanation: • A normal menstrual cycle lasts from 21 -35 days, with 2 - 6 days of flow and an average blood loss of 20 to 60 ml.
• Mean blood loss per cycle is 35 mL (since 35 mL is not given in option, so 5O mL is being taken as the correct answer).
• Mean duration of menses is 4.7 days.
Irregularities in Normal Menstrual Cycle: