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': 'Advantage of coho study ? \nSelect and explain. \nA. Involves fewer number of subjects, B. Inexpensive, C. Suitable for rare disease, D. More than one outcomes can be studied', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., More than one outcomes can be studied", 'role': 'assistant'}]