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': 'In patients with leprosy, lepromin test is performed after injecting intradermally 0.1 ml of lepromin. This test is used for: \nSelect and explain. \nA. Treatment, B. Prognosis, C. Diagnosis, D. Epidemiological investigations', 'role': 'user'}, {'content': "Answer: B \nExplanation: Lepromin test is not a diagnostic test, as it may give positive result in normal subjects and negative results in lepromatous and near-lepromatous cases. Uses of Lepromin test: To evaluate the immune status (cell mediated immunity) of leprosy patients In classifying the disease To estimate the prognosis of leprosy patients Ref: Park's Textbook of Preventive and Social medicine, 19th edition, Page 271.", 'role': 'assistant'}]