This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New born infants, Subject name: Pediatrics
A newborn was given a drug in neonatal ICU, but then was found in respiratory distress. The likely drug is ? 
Select and explain. 
A. Morphine, B. Naloxone, C. Salbutamol, D. Soda-bicarb
A: Morphine
Answer: A: Morphine 
Explanation: Opioids like fentanyl, codeine, pethidine, morphine causes respiratory distress in neonates. Naloxone is the antidote for opioid used in cases of respiratory depression. Salbutamol is a bronchodilator (sho acting selective beta-2 adrenergic agonist) used as an antiasthma agent. Sodium bicarbonate is a micronutrient used for correction of base deficit. Reference : page 740, 747, 749 Ghai Essential Pediatrics 8th edition