This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
All are true about Digoxin except 
Select and explain. 
A. Causes bradycardia due to increased vagal tone causes bradycardia due to increase the vagal tone, B. Acts by inhibiting Na+K+ATPase in myocardial fibres, C. It is 95% plasma protein bound, D. Primaryly excreted unchanged by glomerular filtration
C: It is 95% plasma protein bound
Answer: C: It is 95% plasma protein bound 
Explanation: Plasma protein binding of digitoxin is high(95%) whearas it is Low(70-80%) for Digoxin Refer kDT 6/e p497