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
Filamentous fungi that infect the only superficial keratinized tissues is known as: 
Select and explain. 
A. Dermatophyte, B. Dimorphic fungi., C. Mucormycosis, D. Candida
A: Dermatophyte
Answer: A: Dermatophyte 
Explanation: Dermatophytes causes ringworm