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': 'Anagen effluvium is induced by all except – \nSelect and explain. \nA. Radiation, B. PEM, C. Anticancer drug, D. Prolonged labor', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Prolonged labor induces telogen effluvium (not anagen effluvium).\nRadiation, anticancer drugs and PEM cause anagen effluvium.', 'role': 'assistant'}]