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
[{'content': 'In normal pregnancy character of vagina is: \nSelect and explain. \nA. |ed pH, B. |ed number of lactobacilli, C. |ed Glycogen content, D. |ed number of pathogenic bacteria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lactobacillus acidophilus is increased in pregnancy. Ref: Textbook of Obstetrics By Dutta, 6th Edition, Page 47 ; Williams Gynaecology, 2nd Edition, Page 172', 'role': 'assistant'}]