Pelvic girdle of rabbit is distinguished from that of frog by presence of `:-`

Options

A. Obturator foramen
B. Olecranon fossa
C. Foramen magnum
D. Sigmoid notch

Answer

To answer the question regarding how the pelvic girdle of a rabbit is distinguished from that of a frog, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**: We are comparing the pelvic girdle of two different organisms: the rabbit and the frog.

2. **Understand the Structure**: The pelvic girdle is a bony structure that connects the spine to the lower limbs. It plays a crucial role in supporting the weight of the body and facilitating movement.

3. **Examine the Rabbit's Pelvic Girdle**: In rabbits, the pelvic girdle has a large obturator foramen. The obturator foramen is an opening in the pelvic bone that allows for the passage of nerves and blood vessels.

4. **Examine the Frog's Pelvic Girdle**: In contrast, frogs do not have a large obturator foramen. Their pelvic girdle is structured differently, lacking this specific feature.

5. **Conclude the Distinction**: The key distinguishing feature of the pelvic girdle of a rabbit compared to that of a frog is the presence of a large obturator foramen in rabbits, which is absent in frogs.

### Final Answer:
The pelvic girdle of a rabbit is distinguished from that of a frog by the presence of a **large obturator foramen**, which is absent in frogs.