Question

Observe the flowchart with reference to joints and their examples.

• A. A - Cartilaginous joint, B - Pivot joint, C - Knee joint, D - Cranial sutures
• B. A - Pivot joint, B - Knee joint, C - Cranial sutures, D - Cartilaginous joint
• C. A - Saddle joint, B - Cranial sutures, C - Cartilaginous joint, D - Pivot joint
• D. A - Cranial sutures, B - Cartilaginous joint, C - Pivot joint, D - Knee joint

Hint:

Identify the easiest match first. "Fibrous joint = immovable = cranial sutures" quickly eliminates options 1, 2, and 3.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept: Joints are points of contact between bones, classified into three major structural forms: Fibrous, Cartilaginous, and Synovial.
Step 2: Key Formula or Approach: Systematically decode each branch of the flowchart by matching the joint type with its definition and standard biological examples.
Step 3: Detailed Explanation:
For [A]: Fibrous joints do not allow any movement. An example is the flat skull bones which fuse end-to-end to form the cranium. Thus, [A] is Cranial sutures.
For [B]: The joint "Between adjacent vertebrae" permits limited movement and the bones are joined together with the help of cartilages. Thus, [B] is a Cartilaginous joint.
For [C]: The joint "Between atlas and axis vertebrae" is a specific type of synovial joint that allows rotational movement. Thus, [C] is a Pivot joint.
For [D]: A classic example of a Hinge joint (a type of synovial joint allowing movement in one plane) is the knee joint or elbow joint. Thus, [D] is a Knee joint.
Matching these findings, we get: A - Cranial sutures, B - Cartilaginous joint, C - Pivot joint, D - Knee joint.
Step 4: Final Answer: The correct sequence matches option (4).