This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of nail, Subject name: Dental
Drug that may induce nail pigmentation - melanonychia: 
Select and explain. 
A. Retinoids, B. Carbamazepine, C. Tetracyclines, D. Zidovudine
D: Zidovudine
Answer: D: Zidovudine 
Explanation: Anthracyclines, taxanes, fluorouracil, psoralens, and zidovudine may induce nail pigmentation through melanocyte stimulation in nail matrix resulting in melanonychia. It appears to be reversible and dose-dependent and appears 3-8 weeks after drug intake.