This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other Analytical Studies, Subject name: Social & Preventive Medicine
[{'content': 'All are analytical studies except- \nSelect and explain. \nA. Prevalence study, B. Case control, C. Field trials, D. Coho', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Analytical studies consists of : Cross sectional/prevalence study Ecological study Case control study Coho study Experimental study consists of : RCT Field trial Community Trial Clinical trial', 'role': 'assistant'}]