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: Anatomy
The lumbar region of the veebral column permits all of the following movements, EXCEPT: 
Select and explain. 
A. Flexion, B. Rotation, C. Extension, D. Lateral flexion
B: Rotation
Answer: B: Rotation 
Explanation: Rotation refers to a twisting movement of the veebral column. This is least extensive in the lumbar region. Rotation of the spine is slight in the cervical veebral region, greater in the upper thoracic region and greatest in the lower thoracic region. Muscles involved in rotation of spine are sternocleidomastoid, scalene, splenius capitus, semispinalis thoracis, semispinalis cervicis, rotators, external and internal oblique abdominis.