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
[{'content': 'Epiphora in a patient with seventh nerve palsy is most likely due to: \nSelect and explain. \nA. Eversion of lower punctum, B. Lateral lower lid ectropion, C. Failure of lacrimal pump system, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Failure of lacrimal pump system', 'role': 'assistant'}]