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
Most common type of leprosy 
Select and explain. 
A. TT, B. BT, C. BB, D. LL
B: BT
Answer: B: BT 
Explanation: 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