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Answer: 2. synovial joint

Key idea: Joints that allow free movement are synovial.

The atlas-axis joint (the odontoid process turning in a ring, allowing the head to rotate) is a pivot joint, a type of synovial joint. Cartilaginous joints (e.g. between vertebrae) and fibrous joints (skull sutures) allow little or no movement. Saddle joint is at the base of the thumb. Answer: (2).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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