This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycobacterial Infections, Subject name: Dental
The given technique is useful in diagnosis of: 
Select and explain. 
A. Unreadable image, B. Lichen planus, C. Basal cell carcinoma, D. Leprosy
D: Leprosy
Answer: D: Leprosy 
Explanation: The clip shows slit skin smear taken from pinna. It is used for diagnosis of leprosy.