This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infections, Subject name: Dental
[{'content': 'The following test is not used for dignosis 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: Lepromatous test it is not a diagnostic test but a prognostic test. it helps in the classification of leprosy. antigens used for skin testing: mitsuda lepromin, Dharmendra leprominmanifests as biphasic reaction: early Fernandez (48-72hrs)and late mitsuda reaction (3-4weeks)Represents Cmi towards antigen. Erythema and induration more than 5mm indicates positive and good delayed hypersensitivity. lepromin test positive: tuberculoid, borderline tuberculoid leprosy lepromin test negative in lepromatous leprosy, borderline lepromatous leprosyand mid borderline leprosy iadvl textbook of dermatologypage 2060', 'role': 'assistant'}]