**Joint Anatomy**
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**Core Concept**
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A synovial joint of the condyloid variety is a type of joint that allows for flexion, extension, abduction, adduction, and circumduction movements. It is characterized by an oval-shaped articular surface with two rows of bony prominences, one row of which is usually larger than the other. This type of joint is commonly found in the wrist and fingers.

**Why the Correct Answer is Right**
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The correct answer is a joint that exhibits these characteristic features. The condyloid joint, also known as a ellipsoidal joint, is a type of synovial joint that allows for complex movements. It is found in the wrist (radiocarpal joint) and the base of the fingers (metacarpophalangeal joints). The joint's articular surface is oval-shaped, with two rows of bony prominences, which enables the complex movements associated with this type of joint.

**Why Each Wrong Option is Incorrect**
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* **Option A:** This option is incorrect because it does not specifically refer to a condyloid joint. A hinge joint, such as the elbow, only allows for flexion and extension movements.
* **Option B:** This option is incorrect because it does not describe a synovial joint. A cartilaginous joint, such as the intervertebral disc, connects bones through cartilage.
* **Option D:** This option is incorrect because it does not accurately describe a condyloid joint. A saddle joint, such as the thumb, has a different type of articular surface that allows for movements in two planes.

**Clinical Pearl / High-Yield Fact**
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It is essential to remember that the type of joint determines the range of movements that can occur at that joint. A condyloid joint, with its oval-shaped articular surface, allows for complex movements, whereas a hinge joint, with its simple articular surface, only allows for flexion and extension movements.

**Correct Answer:** C.