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: ENT
Crocodile tears are due to - 
Select and explain. 
A. Cross innervation of facial nerve fibers, B. Cross innervation of trigeminal nerve fibers, C. Improper regeneration of trigeminal nerve, D. Improper regeneration of facial nerve
D: Improper regeneration of facial nerve
Answer: D: Improper regeneration of facial nerve 
Explanation: Crocodile tears (gustatory lacrimation):- There is unilateral lacrimation with mastication. This is due to faulty regeneration of parasympathetic fibres which now supply lacrimal gland instead of the salivary glands. It can be treated by a section of greater superficial petrosal nerve or tympanic neurectomy.