This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunization, Subject name: Pediatrics
[{'content': 'Otitis and osteomyelitis is seen in? \nSelect and explain. \nA. Hepatitis B vaccine, B. BCG, C. Measles vaccine, D. IPV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) BCGRef : OP Ghai 8th ed./191BCG* Although BCG vaccination often causes local reactions, serious or long-term complications are rare. Reactions that can be expected after vaccination include moderate axillary or cervical lymphadenopathy and induration and subsequent pustule formation at the injection site; these reactions can persist for as long as 3 months after vaccination.* Most serious complication of BCG vaccination is disseminated BCG infection.* The most frequent disseminated infection is BCG osteomyelitis', 'role': 'assistant'}]