This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intra Ocular Tumour, Subject name: Ophthalmology
[{'content': 'Epiphora & lagopthalmous following VII nerve injury is due to- \nSelect and explain. \nA. Failure of lacrimal pump, B. Increased lacrimal secretion, C. Nasolacrimal duct obstruction, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Failure of lacrimal pump o Symptomatic epiphora following facial paralysis is most often associated with one or more of the following -i) Impairment of eyelid closure.ii) A compromised lacrimal pump.iii) Lower lid laxity", 'role': 'assistant'}]