This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lymphatic System, Subject name: Surgery
Milroy's disease is 
Select and explain. 
A. Edema due to filariasis, B. Congenital lymphedema, C. Lymphedema following surgery, D. Post cellulitic lymphedema
B: Congenital lymphedema
Answer: B: Congenital lymphedema 
Explanation: Congenital lymphedema or Milroy disease (10%), that is present at bih and associated with an autosomal dominant familial history