Olecranon fossa is present over

Options

A. Radius
B. Ulna
C. Humerus
D. Femur

Answer

**Step-by-Step Solution:**

1. **Identify the Structure**: The question asks about the olecranon fossa, which is a specific anatomical feature.

2. **Understand the Location**: The olecranon fossa is described as a deep triangular depression.

3. **Determine the Bone**: It is located on the posterior side of the humerus, which is the bone of the upper arm.

4. **Function of the Olecranon Fossa**: This fossa provides space for the olecranon of the ulna during the extension of the forearm. The olecranon is the bony prominence of the ulna that forms the elbow.

5. **Conclusion**: Based on the anatomical description and function, the olecranon fossa is present on the humerus.

**Final Answer**: The olecranon fossa is present on the humerus.

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