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
Caspofungin is an antifungal which acts on: 
Select and explain. 
A. Cell wall, B. Cell membrane, C. Mitochondria, D. Nucleic acid
A: Cell wall
Answer: A: Cell wall 
Explanation: Caspofungin, Micafungin, Anidulafungin belongs to "Echocandin"  group which act by inhibiting Beta1-3 glucan synthesis which is a component of cell wall.