This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal infections, Scabies, Pediculosis, Subject name: Dental
Dermatophyes affect - 
Select and explain. 
A. Keratin, B. Dermis of skin, C. Stratum basal, D. Stratum spongiosum
A: Keratin
Answer: A: Keratin 
Explanation: Dermatophytes is is the superficial fungal infection of the keratinised tissue commonly called tinea. they are keratophilic organisms invade dead tissue- stratum corneum skin, hair and nails iadvl textbook of dermatology page 252