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: Pediatrics
Retinopathy of Prematurity (ROP) screening is done in the following babies 
Select and explain. 
A. Preterm < 34 weeks of gestation, B. Preterm of 33 weeks of gestation who required mechanical ventilation, C. Babies with birth weight < 1.8 kg, D. Babies with birth weight < 2 kg
B: Preterm of 33 weeks of gestation who required mechanical ventilation
Answer: B: Preterm of 33 weeks of gestation who required mechanical ventilation 
Explanation: Retinopathy of Prematurity (ROP) Screening is done in

Preterm babies < 32 weeks of gestation
Babies with birth weight < 1.5 kg
Preterm babies of  32 - 34 weeks of gestation
	Babies with birth weight 1.5 - 2 kg

Preterm babies of 32-34 weeks and babies with birth weight 1.5-2kg should have had bad neonatal course like:
a) Ventilatory support
b) O2 supply for > 24 hours
c) Ionotrope support for condition like shock
d) Blood transfusion
e) Culture positive sepris.