This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Congenital Anomalies of Nose and PNS, Subject name: ENT
A 2 years old male is brought to the hospital there is a compressible swelling at the root of nose, likely diagnosis is 
Select and explain. 
A. Meningoencephalocele, B. Lacrimal sac cyst, C. Ethmoid sinus cyst, D. Orbital extension arterial malformation
A: Meningoencephalocele
Answer: A: Meningoencephalocele 
Explanation: Ans. is 'a' i.e.meningoencephalocele It is herniation of the brain along with meninges through a congenital bony defectSwelling shows cough impulse*.It may be reducible.