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: Dental
[{'content': 'Exclamation mark alopecia is a feature of – \nSelect and explain. \nA. Telogen effluvium, B. Androgenic alopecia, C. Alopecia aerata, D. Alopecia mucinosa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Exclamation mark hair are pathognomic of alopecia areata.', 'role': 'assistant'}]