This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
[{'content': 'Keratomalacia (REPEATED question) \nSelect and explain. \nA. Occurs due to vitamin A deficiency, B. Relatively benign condition, C. First feature of vitamin A deficiency, D. Also seen in retinitis pigmentosa', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Night blindness is a first feature of Vitamin A deficiency and is also a feature of retinitis pigmentosa Refer: Khurana 6th edition page number 468', 'role': 'assistant'}]