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
Lymphovenous anastomosis is done for ? 
Select and explain. 
A. Filarial lymphoedema, B. Lymphoid cyst, C. Cystic hygroma, D. Malignant lymphoedema
A: Filarial lymphoedema
Answer: A: Filarial lymphoedema 
Explanation: Answer is 'a' i.e. Filarial lymphoedema