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 that does not prevent preterm labor is: 
Select and explain. 
A. Ritodrine, B. Atosiban, C. Dexamethasone, D. Nitroglycerine patch
C: Dexamethasone
Answer: C: Dexamethasone 
Explanation: 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)