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
What is the type of joint between the ossicles of ear - 
Select and explain. 
A. Fibrous joint, B. Primary cartilaginous, C. Secondary cartilaginous, D. Synovial joint
D: Synovial joint
Answer: D: Synovial joint 
Explanation: Joints of the ossicles are synovial joints

The incudomalleolar joint is a saddle joint (variety of synovial joint)
Incudostapedial joint is a ball and socket joint (type of synovial joint)