This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'The factories Act (1976) prohibits employment of a person below - \nSelect and explain. \nA. 10 years, B. 14 years, C. 18 years, D. 21 years', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is `b' i.e., 14 years", 'role': 'assistant'}]