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: Unknown
A 55 year old cardiac patient who wason long term treatment comes for follow up visit.The physician observes the following finding on opthalmologicalexamination.Which drug prescribed by the physician would most probably be responsible for this? 
Select and explain. 
A. Digoxin, B. Verapamil, C. Amiodarone, D. Propranolol
C: Amiodarone
Answer: C: Amiodarone 
Explanation: The image shows “vortex keratopathy”.Here,there is a whorl-like pattern of epithelial deposits in the cornea. - Causes (Ref:Parsons’ 21 s ted)
a) Drugs-
Amiodarone,Chloroquine,Phenothiazines,Indomethacin
b) Fabry’s disease and its carrier state
- The whorl like pattern shows the direction of migration of corneal epithelial cells.