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
A two months old child presents with epiphora and regurgitation. The most probable diagnosis is- 
Select and explain. 
A. Mucopurulent conjunctivitis, B. Buphthalmos, C. Congenital dacryocystitis, D. Encysted mucocele
C: Congenital dacryocystitis
Answer: C: Congenital dacryocystitis 
Explanation: Epiphora in 2 months old child can be caused by ophthalmia neonatorum (mucopurulent conjunctivitis of newborn), buphthalmos (congenital glaucoma) and congenital dacryocystitis. However, regurgitation of mucopurulent discharge on pressure over the sac area is seen in congenital dacryocystitis.