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': 'Silicosis can be controlled by: September 2004 \nSelect and explain. \nA. Effective implementation of factories act, B. Rigorous dust control, C. Adequate personal hygiene, D. BCG vaccination', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Rigorous dust control', 'role': 'assistant'}]