This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Front of Thigh, Subject name: Anatomy
[{'content': 'Which is the longest muscle of the body: \nSelect and explain. \nA. Sartorius, B. Extraocular muscle, C. External oblique, D. Popliteal muscle', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A SartoriusRef: BDC, 6th ed. vol. II pg. 53* Sartorius muscle is the longest muscle of the body.* It is also known as tailor's muscle (Sartor = tailor)", 'role': 'assistant'}]