To determine where the obturator foramen is found, we can follow these steps:
### Step-by-Step Solution:
1. **Understanding the Obturator Foramen**:
- The obturator foramen is a large hole in the pelvic bone. It is formed by the ischium and pubis bones.
2. **Function of the Obturator Foramen**:
- This foramen allows nerves and blood vessels to pass through the pelvis, connecting the lower limbs to the body.
3. **Identifying the Correct Location**:
- We need to determine whether the obturator foramen is found in the pelvic girdle or pectoral girdle of either the frog or the rabbit.
4. **Analyzing the Options**:
- The options provided are:
- Frog's pelvic girdle
- Rabbit's pelvic girdle
- Frog's pectoral girdle
- Rabbit's pectoral girdle
- Since the obturator foramen is associated with the pelvic region, we can eliminate the options related to the pectoral girdle.
5. **Choosing Between the Pelvic Girdle Options**:
- The obturator foramen is specifically a feature of the pelvic girdle in mammals, including rabbits. Frogs do not have an obturator foramen as they have a different skeletal structure.
6. **Conclusion**:
- Therefore, the obturator foramen is found in the rabbit's pelvic girdle.
### Final Answer:
The obturator foramen is found in the **rabbit's pelvic girdle**.
---
