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
Milroys disease is - 
Select and explain. 
A. Edema due to filariasis, B. Post cellulitic lymphedema, C. Congenital lymphedema, D. Lymphedema following surgery
C: Congenital lymphedema
Answer: C: Congenital lymphedema 
Explanation: None