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': 'Which of the following is not a diahrosis ? \nSelect and explain. \nA. Elbow joint, B. Interphalangeal joint, C. Skull sutures, D. Hip joint', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., Skull sutures Functional classification of joints (movement) Joints can also be classified functionally according to the type and degree of movement they allow: Synahrosis - Permits little or no mobility. Most synahrosis joints are fibrous joints (e.g., skull sutures). Amphiahrosis - Permits slight mobility. Most amphiahrosis joints are cailaginous joints (e.g., interveebral discs). Diahrosis - Freely movable. All diahrosis joints are synol joints (e.g., shoulder, hip, elbow, knee, etc.), and the terms "diahrosis" and "synol joint" are considered equivalent by Terminologia Anatomica', 'role': 'assistant'}]