Question

Which of the following is ${{10}^{th}}$ cranial nerve?
A. Trigeminal
B. Neurogastric (Vagus)
C. Glossopharyngeal
D. Trochlear

Answer 1

Hint: There are $12$ cranial nerves in our body. Cranial nerves arise directly from the brain. Some cranial nerves take information from various sense organs towards the brain, some control muscles while other cranial nerves are connected to various glands and organs.

Complete answer:
Option A: Trigeminal
Trigeminal nerve is the ${{5}^{th}}$ cranial nerve. It is the largest cranial nerve and performs sensory as well as motor functions. It has three divisions.
Option A is not correct.
Option B: Neurogastric (Vagus)
Vagus or Neurogastric nerve is the ${{10}^{th}}$ cranial nerve. Vagus nerve is the cranial nerve that has the longest pathway. It has both sensory and motor functions.
Option B is correct.
Option C: Glossopharyngeal
The Glossopharyngeal nerve is the ${{9}^{th}}$ cranial nerve. It is a mixed nerve which means that it performs both sensory and motor functions. It originates from the Medulla oblongata of hind brain and reaches the tongue and pharynx, hence the name glossopharyngeal.
Option C is not correct.
Option D: Trochlear
Trochlear nerve is the ${{4}^{th}}$ cranial nerve. It supplies the superior oblique muscle of the eye and is responsible for outward, downward and inward movement of the eyeball.
Option D is not correct.

Therefore, Option B is correct.

Note:
Vagus nerve begins from Medulla oblongata and reaches our abdomen. Hence it is known as Neurogastric nerve. It branches to the ear canal, part of your throat, organs in trunk and chest like intestine and heart. It is also responsible for taste in the dorsal part of your tongue.