Question

The two additional cranial nerves present in mammals are

• A. Pharyngeal and vagus
• B. Spinal accessory and hypoglossal
• C. Trigeminal and glossopharyngeal
• D. Hypoglossal and sciatic

Answer 1

The correct option is B Spinal accessory and hypoglossal

There are 12 pairs of nerves found in reptiles, birds, humans and other mammals. There are 10 pairs of cranial nerves in fishes and amphibians. The additional two pairs of cranial nerves are spinal accessory and hypoglossal nerve. These nerves are not present in lower animals like frog.

So, the correct answer is option B.