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: Ophthalmology
[{'content': 'All of the following are true for anaemic retinopathy except: \nSelect and explain. \nA. Occurs when haemoglobin level falls below 5 gm percent, B. Aerioles become pale, C. Veins are pale and narrow, D. Superficial retinal haemorrhages and subhyaloid haemorrhage are seen invariably', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Veins are pale and narrow', 'role': 'assistant'}]