This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
This type of lesion in HIV patient is caused most likely by which of the following? 
Select and explain. 
A. Bacteria, B. Fungus, C. Virus, D. Parasite
B: Fungus
Answer: B: Fungus 
Explanation: Ans. B. Fungusa. This HIV/AIDS patient presented with a secondary oral pseudomembranous candidiasis infection.b. The immune system which suffers with HIV undergoes a dramatic reduction in its effectiveness, resulting in the greater possibility of secondary infections.