This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Skin, Subject name: Skin
[{'content': 'Dermatophytes primarily involves _______: \nSelect and explain. \nA. Stratum corneum, B. Stratum granulosum, C. Stratum basale, D. Stratum spinosum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Stratum corneumDermatophytes infect and survive only in the dead keratin layers of skin (stratum corneum), hair and nails as they are keratinophilic.', 'role': 'assistant'}]