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: Microbiology
Which of the following is a fungus - 
Select and explain. 
A. Klebsiella, B. Clostridia, C. Pneumocystis jerovecii, D. Listeria
C: Pneumocystis jerovecii
Answer: C: Pneumocystis jerovecii 
Explanation: Pneumocystis jerovecii is considered to be fungus based on following points:

It takes fungal stains like Gomori’s methanamine silver stain
It possesses chitin at all stages of development (component of fungal cell wall)
Based on molecular study of 5S –rRNA.