This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
A newborn developed respiratory depression in a postoperative ward. It can result from the use of? 
Select and explain. 
A. Opioid, B. Propofol, C. Furosemide, D. Heparin
A: Opioid
Answer: A: Opioid 
Explanation: Babies born to mothers who were addicts prior to delivery will also be dependent. Withdrawal symptoms may be irritability, excessive crying, tremors, frantic suckling if fists , diarrhea, sneezing, yawning, vomiting and fever and can result in respiratory depression. All the other given drugs do not produce withdrawal symptoms in newborn. Ref: KD Tripathi 8th ed.