This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
Antidote of digoxin: 
Select and explain. 
A. Potassium, B. Lignocaine, C. Fab fragment, D. Propranalol
C: Fab fragment
Answer: C: Fab fragment 
Explanation: Ans: c (Fab) Ref: Katzung, 10th ed, p. 205In severe digitalis intoxication patients are best treated with prompt insertion of a temporary cardiac pacemaker catheter and administration of digitalis antibodies (digoxin immune fab).These antibodies recognize digitoxin and cardiac glycosides from many other plants in addition to digoxin. They are extremely useful in reversing severe intoxication with most glycosides.