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: ENT
A 2 year old child is brought to the hospital with a compressible swelling at the root of nose, most likely diagnosis is: 
Select and explain. 
A. A V malformation, B. Lacrimal sac cyst, C. Ethmoid sinus cyst, D. Meningoencephalocele
D: Meningoencephalocele
Answer: D: Meningoencephalocele 
Explanation: Lacrimal sac cyst occurs as a compressible swelling near the medial canthus and not root of nose. Ethmoid cyst (mucocele) presents as a swelling at the medial quadrant of orbit pushing the orbit forwards and laterally. AV malformation is a congenital abnormal connection between aeries and veins, bypassing the capillary system.These are largely found in internal organs and is rare at this site.