Supratrochlear fossa is present in the

Options

A. Humerus of frog
B. Humerus of rabbit
C. Radius of rabbit
D. Radius of frog

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the location of the supratrochlear fossa. We need to identify which bone it is associated with.

2. **Identifying the Options**: The options provided are:
- Humerus of frog
- Humerus of rabbit
- Radius of rabbit
- Radius of frog

3. **Defining Supratrochlear Fossa**: The supratrochlear fossa is also known as the radial fossa. It is a specific anatomical feature found in certain bones.

4. **Analyzing the Bones**:
- The **humerus** is a long bone in the upper arm, which connects the shoulder to the elbow.
- The **radius** is one of the two bones in the forearm, located on the same side as the thumb.

5. **Determining the Correct Answer**:
- The supratrochlear fossa is present in the humerus of mammals, specifically in the humerus of the rabbit.
- Therefore, the correct answer is the **humerus of rabbit**.

6. **Conclusion**: The supratrochlear fossa is present in the humerus of the rabbit.