This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Maternal and child care, Subject name: Social & Preventive Medicine
[{'content': 'In GOBI, O stands for \nSelect and explain. \nA. Oral hygiene, B. Oral rehydration, C. Oral drugs, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: G - growth monitoring O - oral rehydration B - breast feeding I - immunization', 'role': 'assistant'}]