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': "Neurotrophic keratopathy is caused by – \nSelect and explain. \nA. Bell's palsy, B. Facial and trigeminal nerve palsy both, C. Trigeminal nerve palsy, D. All of the above", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Neuroparalytic keratitis occurs due to interruption of sensory impulses over trigeminal nerve.', 'role': 'assistant'}]