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
A preterm baby of 26 weeks of gestation is born. At what age should screening for Retinopathy of Prematurity (ROP) be done 
Select and explain. 
A. 2 weeks postnatal life, B. 3 weeks postnatal life, C. 4 weeks postnatal life, D. 5 weeks postnatal life
B: 3 weeks postnatal life
Answer: B: 3 weeks postnatal life 
Explanation: Normally, for all Preterm babies ROP screening is done 32 weeks of gestation or 4 weeks postnatal life whichever is later.
But, in newborn born < 28 weeks of gestation, ROP Screening is done at 3 weeks postnatal life.