This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
[{'content': 'During a routine physical examination a 65-year-old male patient is tested for ease and flexibility of the movements of his lumbar region. Which of the following movements is most characteristic of the intervertebral joints in the lumbar region? \nSelect and explain. \nA. Circumduction, B. Lateral flexion, C. Abduction, D. Adduction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lateral flexion is the best answer because other movements of the lumbar portion of the vertebral column are very limited due to the orientation of the articular facets.', 'role': 'assistant'}]