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
Therapeutic plasma level of digoxin is: 
Select and explain. 
A. 0.1–0.3 ng/ml, B. 0.8–1.5 ng/ml, C. 1.2 to 2 ng/ml, D. More than 2.4 ng/ml
B: 0.8–1.5 ng/ml
Answer: B: 0.8–1.5 ng/ml 
Explanation: None