This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: mycology, Subject name: Microbiology
Which of the following is a fungus 
Select and explain. 
A. Klebsiella rhinoscleromatis, B. Clostridium botulinum, C. Pneumocystis jerovecii, D. Listeria monocytogenes
C: Pneumocystis jerovecii
Answer: C: Pneumocystis jerovecii 
Explanation: Fugus - possess rigid cell wall containing chitin mannan and other polysaccharides. The cytoplasmic membrane containing sterols. Cytoplasm contains true nuclei with nuclear membrane, mitochondria and endoplasmic reticulum. May be unicellular or multicellular. They divide asexually, sexually or by both processes. Ref: Textbook of Microbiology, Ananthanarayan and Paniker; 9th edition