This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'The major purpose of Randomization in clinical trails is to- \nSelect and explain. \nA. Facilitate double blinding, B. Help ensure that that study subjects are representative of general population, C. Ensure that the groups are comparable on baseline characteristics, D. Reduce selection bias in allocation of treatment', 'role': 'user'}, {'content': "Answer: D \nExplanation: Randomization ensures that the investigator has no. Control over allocation of paicipants to either study or control groups, thus eliminating what is known as selection bias. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 90", 'role': 'assistant'}]