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: Gynaecology & Obstetrics
Drug given to reduce uterine contractions during preterm labour with least side effects : 
Select and explain. 
A. Ritodrine, B. Nifidipine, C. Magnessium sulphate, D. Progesterone
B: Nifidipine
Answer: B: Nifidipine 
Explanation: Ans. is b i.e. Nifedipine