This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'For a group of n = 250 subjects, 40th percentile would be the following value- \nSelect and explain. \nA. 7th, B. 40th, C. 100th, D. 140th', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref: Parks 23rd edition 40th percentile means 40% values are below that paicular value . 40% of 250= 100', 'role': 'assistant'}]