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
[{'content': 'Drug that does not prevent preterm labor is: \nSelect and explain. \nA. Ritodrine, B. Atosiban, C. Dexamethasone, D. Nitroglycerine patch', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dexamethasone REF: See APPENDIX-64 for list of "Tocolytic agents" "Steroids are given in preterm labor for fetal lung maturity and not as tocolytic agent" Nitroglycerine is also a tocolytic agent not listed in the APPENDIX-64 as it is not used routinely (not recommended)', 'role': 'assistant'}]