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
[{'content': "Milroy's disease is \nSelect and explain. \nA. Edema due to filariasis, B. Congenital lymphedema, C. Lymphedema following surgery, D. Post cellulitic lymphedema", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Congenital lymphedema or Milroy disease (10%), that is present at bih and associated with an autosomal dominant familial history', 'role': 'assistant'}]