This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiological Changes of Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'In normal pregnancy following characteristics of vagina are seen except: \nSelect and explain. \nA. More Acidic pH, B. |ed number of Lactobacilli, C. |ed Glycogen content, D. |ed number of pathogenic bacteria', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vagina has increased vascularization and hyperophied. Estrogen produces increase in vaginal secretions which is thick, white and acidic (pH: 3.5 to 6; due to increased production of lactic acid from glycogen by lactobacillus acidophilus). Acidic environment is unourable for growth of most pathogenic organisms.', 'role': 'assistant'}]