This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Types of vaccines, Subject name: Pediatrics
[{'content': 'Osteitis may be seen as a side effect of: \nSelect and explain. \nA. Hepatitis B vaccine, B. BCG, C. Measles vaccine, D. IPV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Side effects of BCG vaccine Local ulceration Discharging sinus Axillary lymphadenitis In immunocompromised pt - Disseminated infection, osteomyelitis, scrofuloderma are seen OTHER OPTIONS & ASSOCIATED SIDE EFFECTS:', 'role': 'assistant'}]