This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical Illness Complicating Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'During pregnancy HIV transmission occurs mostly during - \nSelect and explain. \nA. 1st trimester, B. 2nd trimester, C. 3rd trimester, D. During labour', 'role': 'user'}, {'content': 'Answer: D \nExplanation: An HIV positive woman can transmit the virus to her baby during pregnancy, labor and through breastfeeding. Maximum chances of mother to child transmission is during intrapaum period The risk of Mother to child transmission can be reduced to as low as 2% if ARV is given during pregnancy and labour and then to the infant in the first weeks of life.', 'role': 'assistant'}]