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: Surgery
Not compressible swelling is: 
Select and explain. 
A. Meningocele, B. Lymphangioma, C. Mucocele, D. Cystic hygroma
B: Lymphangioma
Answer: B: Lymphangioma 
Explanation: None