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: Orthopaedics
[{'content': 'Tuberculosis of the spine commonly affects all of the following parts of the vertebra except - \nSelect and explain. \nA. Body, B. Lamina, C. Spinous process, D. Pedicle', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Posterior (appendiceal) type is least common form of spinal TB.\nIn posterior type, spinous process and transverse process are involved least commonly.', 'role': 'assistant'}]