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: Pharmacology
Pigmentation of nail is caused by all of these drugs except: 
Select and explain. 
A. Cyclophosphamide, B. Chlorpromazine, C. Chloroquine, D. Amiodarone
D: Amiodarone
Answer: D: Amiodarone 
Explanation: Ans: D. Amiodarone(Ref: KDT 7//e p534)Amiodarone:Cause corneal deposits.Not causes nail pigmentation.Causes of Melanonychia or Nail PigmentationPhenothiazines like ChloroquineMinocyclineArsenicClofazimineClomipramineCyclophosphamidFluconazoleFluorideGold saltsIbuprofenKetoconazoleLamivudineMercuryPhenytoinPsoralenRoxithromyciSteroidsSulfonamideTetracyclineThalliumTimoloZidovudine