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: Unknown
Site of action of amphotericin B is: 
Select and explain. 
A. Ribosomes, B. Cell wall, C. Cell membrane, D. Protein
C: Cell membrane
Answer: C: Cell membrane 
Explanation: Ref. KDT. Page. 787
Amphotericin:

The polyenes have high affinity for ergosterol present in fungal cell membrane: combine with it, get inserted to form a ‘micropore’.
The hydrophilic side forms the interior of the pore through which ions, amino acids and other water- soluble substances move out.
The micropore is stabilized by membrane sterols which fill up the spaces between the AMB molecules on the lipophilic side—constituting the outer surface of the pore. Thus, cell permeability is markedly increased.