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': 'ESI Act includes all the following except \nSelect and explain. \nA. small power using factories persons, B. defence establishment employing, C. Newspaper establishment, D. Non power using factories employing 20 or more person', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]