This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, 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: (d) Synovial joint(Ref. Scott Brown, 8th8 ed., Vol 2 page 533)The head of malleus articulates with the body of incus. This incudomalleolar joint is a saddle type of synovial joint.The long process of incus ends in a lentiform nodule. This lentiform nodule of incus articulates with the head of stapes. This incudostapedial joint is a ball and socket type of synovial joint.