This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
pH of the vagina during reproductive age is - 
Select and explain. 
A. 2.5-3.7, B. 5-Apr, C. 7-Jun, D. 7.2-8.6
B: 5-Apr
Answer: B: 5-Apr 
Explanation: Ans. is 'b' i.e., 4-5 PeriodpHBirth-2 weeks4-52 weeks-prepuberty PubertyShifts from alkaline to acidReproductive period4-5PostmenopauseNeutral or alkaline 6 to >7