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 is commonly predisposed by – 
Select and explain. 
A. Less gestation age, B. Low birth weight, C. O2 toxicity, D. Carbohydrate excess
A: Less gestation age
Answer: A: Less gestation age 
Explanation: None