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
[{'content': 'A child presenting with localized patches of complete hair loss with normal appearance of scalp. Diagnosis is ? \nSelect and explain. \nA. Tinea capitis, B. Cradle cap, C. Alopecia areata, D. Telogen effluvium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'c' i.e., Alopecia areata Alopecia areata is characterized by patchy hair loss without skin atrophy. Tinea capitis is also associated with patchy hair loss but in this either hair loss is paial (non inflammatory type) or there is some associated scalp lesion (inflammatory type, black dot and us type) Craddle cap is usually not associated with hair loss. Telogen effluvium is characterized by stress related diffuse hair loss.", 'role': 'assistant'}]