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
Epiphora & lagopthalmous following VII nerveinjury is due to? 
Select and explain. 
A. Failure of lacrimal pump, B. Increased lacrimal secretion, C. Nasolacrimal duct obstruction, D. None of the above
A: Failure of lacrimal pump
Answer: A: Failure of lacrimal pump 
Explanation: Ans. is 'a' i.e., Failure of lacrimal pump Symptomatic epiphora following facial paralysis is most often associated with one or more of the following ? Impairment of eyelid closure. A compromised lacrimal pump. Lower lid laxity