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': 'Absence of lacrimation is seen in which nerve injury \nSelect and explain. \nA. Nasociliary nerve, B. Greater petrosal nerve, C. Supraorbital nerve, D. Infraorbital/Ethmoidal nerve', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Greater petrosal', 'role': 'assistant'}]