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
Absence of lacrimation is seen in which nerve injury 
Select and explain. 
A. Nasociliary nerve, B. Greater petrosal nerve, C. Supraorbital nerve, D. Infraorbital/Ethmoidal nerve
B: Greater petrosal nerve
Answer: B: Greater petrosal nerve 
Explanation: B i.e. Greater petrosal