This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Back region, Subject name: Anatomy
Dislocation of the veebra is uncommon in thoracic region because in this region 
Select and explain. 
A. The aicular processes are interlocked, B. The veebral body is long, C. Anterior longitudinal ligament is strong, D. Spinous process is long and pointed
A: The aicular processes are interlocked
Answer: A: The aicular processes are interlocked 
Explanation: The superior aicular process is directed backward, upward and laterally (BUL) in the thoracic region. It interlocks with the corresponding inferior aicular facet making a strong aiculation rendering dislocation in the thoracic region uncommon.