This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
Retinopathy of prematurity-risk factors are all except 
Select and explain. 
A. Prematurity, B. Bih weight less than 1.5 kg, C. Excessive oxygen used, D. Polyhydramnios
D: Polyhydramnios
Answer: D: Polyhydramnios 
Explanation: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 283)Impoant risk factors for ROM are:-Primary: Prematurity: Gestation age <32 weeks (most impoant): Bih weight <1.5kg; Oxygen therapy: Excessive oxygen useOther: Sepsis, multiple blood transfusions, apnoeic spells, metabolic acidosis, use of aminophylline & antibiotics