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
A soft, cystic, fluctuant swelling in a child's neck which
is brilliantly translucent is most likely 
Select and explain. 
A. Sternornastoid tumour, B. Cystic hygroma, C. Branchial cyst, D. Cold abscess
B: Cystic hygroma
Answer: B: Cystic hygroma 
Explanation: None