This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': 'Most common type of leprosy \nSelect and explain. \nA. TT, B. BT, C. BB, D. LL', 'role': 'user'}, {'content': "Answer: B \nExplanation: Mycobacterium leprae - Causes hansen's disease- Not cultured in pure culture media - Most common type is BT - Rarest type of leprae BB - First sensation lost is cold then hot Fig - Lepra cells / Virchow cells / Foam cells", 'role': 'assistant'}]