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 an adrenergic drug preferred for arresting labour ? 
Select and explain. 
A. Ritodrine, B. Isoprenaline, C. Salbutamol, D. Terbutaline
A: Ritodrine
Answer: A: Ritodrine 
Explanation: None