Answer: Sutures.
- A Hinge joints
- B Pivot joints
- C Gliding joints
- D Sutures
Correct answer: D. Sutures
Explanation: Skull bones meet at fibrous, immovable joints called sutures.

A sarcomere (Z line to Z line): during contraction the I band and H zone shorten as thin filaments slide over thick, while the A band stays the same length. Image: SlothMcCarty, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Types of movement, muscle contraction, skeletal system, joints, and disorders. Important for Class 11 and NEET.