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': 'Holdswoh classification of thoracolumbar spine fracture is based on how many columns of spine? \nSelect and explain. \nA. Two, B. Three, C. Five, D. Four', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. TwoHoldswoh,s proposed two column concept of thoracolumbar spine fractureAntetior column : Consists veebral body, annulus fibrous, Anterior and posterior longitudinal ligamentsposterior column: Consists of veebral arch (pedicle, facets, laminae) and posterior ligaments (ligamentum flavum,interspinous and supraspinus ligament)', 'role': 'assistant'}]