This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
Castellani's paint contains all of the following except 
Select and explain. 
A. Basic fuchsin, B. Phenol, C. Benzene hexachloride, D. Boric acid
C: Benzene hexachloride
Answer: C: Benzene hexachloride 
Explanation: Castellani's paint is used to disinfect skin and to treat 'fungus infections of the skin. Its components are phenol, resorcinol, basic fuchsin, boric acid, and acetone.