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
Which of the following is safe drug for nursing mother? 
Select and explain. 
A. Chloramphenicol, B. Digoxin, C. Lithium, D. Amphetamines
B: Digoxin
Answer: B: Digoxin 
Explanation: Ans. is 'b' i.e., Digoxin