This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'The following test is not used for diagnosis of leprosy - \nSelect and explain. \nA. Lepromin test, B. Slit skin smear, C. Fine needle aspiration cytology, D. Skin biopsy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lepromin test is not a diagnostic test.The 2 drawbacks that stand in the way of this test being used for diagnosis are: Positive results in non cases Negative results in lepromatous and near lepromatous cases Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 338', 'role': 'assistant'}]