This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2017, Subject name: Pharmacology
[{'content': 'Ritodrine is a:- \nSelect and explain. \nA. b 2 agonist, B. b antagonist, C. a agonist, D. a 1 antagonist', 'role': 'user'}, {'content': 'Answer: A \nExplanation: * Selective b2 stimulants : salbutamol, terbutaline, salmeterol, formoterol and ritodrine * b2 agonists can be used for preterm labour as they cause uterine relaxation. * b2 Stimulators Used in preterm labour : RITODRINE ISOXSUPRINE', 'role': 'assistant'}]