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
[{'content': 'Milroys disease is - \nSelect and explain. \nA. Edema due to filariasis, B. Post cellulitic lymphedema, C. Congenital lymphedema, D. Lymphedema following surgery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]