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
Fever with pulmonary disease leading to severe pneumonia if untreated caused by which of the following dimorphic fungi? 
Select and explain. 
A. Coccidiodes immitis, B. C neoformis, C. C albicans, D. Aspergillus
A: Coccidiodes immitis
Answer: A: Coccidiodes immitis 
Explanation: Coccidiodes immitis-pulmonary system severely affected Fatal if untreated It is dimorphic fungus present in yeast and in mycelial form Ref: Baveja 5th ed pg: 555