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: ENT
[{'content': 'What is the type of joint between the ossicles of ear - \nSelect and explain. \nA. Fibrous joint, B. Primary cartilaginous, C. Secondary cartilaginous, D. Synovial joint', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Joints of the ossicles are synovial joints\n\nThe incudomalleolar joint is a saddle joint (variety of synovial joint)\nIncudostapedial joint is a ball and socket joint (type of synovial joint)', 'role': 'assistant'}]