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: Pathology
All of the following statements about thrush are true
EXCEPT 
Select and explain. 
A. It is caused by a gram-negative fungus, B. It is characterized by a plaque of proliferating epithelial and other cells, C. It is a complication of immunosuppression or systemic disease, D. It can affect neonates in an epidemic fashion
A: It is caused by a gram-negative fungus
Answer: A: It is caused by a gram-negative fungus 
Explanation: None