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: Anatomy
[{'content': 'Loss of lacrimation occurs due to injury of \nSelect and explain. \nA. Nasocilliary nerve, B. Greater petrosal nerve, C. Anterior ethmoidal nerve, D. Supraorbital nerve', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Parasympathetic secretomotor nerve fibres destined for the lacrimal gland arise from the lacrimal nucleus of the facial nerve. They travel via the great petrosal nerve to reach the lacrimal gland. Consequently injuries of the greater petrosal nerve can cause loss of lacrimation.', 'role': 'assistant'}]