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
Anagen effluvium is induced by all except – 
Select and explain. 
A. Radiation, B. PEM, C. Anticancer drug, D. Prolonged labor
D: Prolonged labor
Answer: D: Prolonged labor 
Explanation: Prolonged labor induces telogen effluvium (not anagen effluvium).
Radiation, anticancer drugs and PEM cause anagen effluvium.