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': 'Which is not seen in retinitis pigmentosa: \nSelect and explain. \nA. Pale waxy optic disc, B. Attenuated vessels, C. Retinal haemorrhages, D. Bone corpuscles', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Retinal haemorrhages', 'role': 'assistant'}]