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 Gridiron incision becomes a Rutherford Morison's incision is extended by - \nSelect and explain. \nA. Splitting the muscles laterally, B. Cutting the muscles laterally, C. Cutting the muscles medially into the rectus sheath, D. Incising vertically along the rectus muscle", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]