The characteristic and an example of a synovial joint in humans is:
Characteristics $-$ Examples

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