This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious Diseases, Subject name: Gynaecology & Obstetrics
[{'content': 'Transmission of HIV infection from infected mother to child occurs most commonly during - \nSelect and explain. \nA. Antenatal stage, B. Before delivery, C. Duringlabour, D. During lactation', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e.. During labour", 'role': 'assistant'}]