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': 'Which of these vaccines is not contraindicated in pregnancy? \nSelect and explain. \nA. Measles, B. Hepatitis B, C. Varicella, D. BCG', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hepatitis B vaccine can be given to a high risk mother in pregnancy if she is seronegative. Vaccines contraindicated in pregnancy are Mumps Measles Rubella Varicella BCG Live influenza vaccine', 'role': 'assistant'}]