Which of the following cranial nerves innervates the structure identified here (at the top and it appears deep red) that is needed by a cellular phone user: (I'm sorry but the arrows that are in pictures are not coming onto the picture when I post it)
1. VII
2. X
3. XII
4. I
5. VI

Answer: #3: XII, why? The hypoglossal nerve, a motor nerve and the twelfth cranial nerve, provides innervation to the genioglossus muscle comprising the tongue.