The characteristic and an example of a synovial joint in humans is

• A
  Fluid filled synovial cavity between two bones $\Rightarrow$ Joint between atlas and axis
• B
  Lymph filled between two bones,limited movement $\Rightarrow$ Gliding joint between carpals
• C
  Fluid cartilage between two bones,limited movements $\Rightarrow$ Knee joint
• D
  Fluid filled between two joints,provides cushion $\Rightarrow$ Skull bones