This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health education & planning, Subject name: Social & Preventive Medicine
[{'content': 'A health assistant (male) covers a population of - \nSelect and explain. \nA. 1,000, B. 5,000, C. 30,000, D. 1,00,000', 'role': 'user'}, {'content': "Answer: C \nExplanation: - the suggested norm of health assistant male is 1 per 30,000 population in plain area and 20,000 population in tribal or hilly areas. - he provide suppoive supervision to 6 health workers. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:900 <\\p>", 'role': 'assistant'}]