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 is- 
Select and explain. 
A. Cerebrospinal fluid running from the nose after fracture of anterior cranial fossa, B. An epiphenomenors of a cerebral tumor, C. An abnormal overflow of tears due to obstruction of lacrimal duct, D. Eversion of lower eyelid following injury
C: An abnormal overflow of tears due to obstruction of lacrimal duct
Answer: C: An abnormal overflow of tears due to obstruction of lacrimal duct 
Explanation: Excessive secretion of tears → hyperlacriination.
Obstruction to the outflow of normally secreted tears or due to lacrimal pump failure → epiphora.