This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Topically used antifungal agent is : 
Select and explain. 
A. Ketoconazole, B. Clotrimazole, C. Amphotericin, D. Physostigmine
B: Clotrimazole
Answer: B: Clotrimazole 
Explanation: None