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': 'A distressing complication of radical mastectomy is- \nSelect and explain. \nA. Paralysis of the fifth finger of the hand, B. Odema of the arm, C. Loss of sensation of the medial side of the arm, D. Frequent skin infections of the hand on the affected side', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]