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: Skin
Ring worm fungi live in 
Select and explain. 
A. Stratum Corneum, B. Dermis, C. Prickle Cell layer, D. Basal Cell layer
A: Stratum Corneum
Answer: A: Stratum Corneum 
Explanation: A i.e. Stratum corneum Dermatophytosis is caused by trichophyton, epidermophyton & microsporumQ; and it infects superficial topmost layer of skin (stratum corneum or keratin layer), hair and nailsQ. Cutaneous mycosis (Tenia or Ring worm or Dermatophytosis) infect stratum corneum, hair & nailsQ and do not penetrate living tissues.