Answer :
The muscle that would be affected is the Genioglossus. That is option C.
The hypoglossal nerve is the also known as cranial nerve XII.
This nerve arises from the nuclei in the medulla oblongata.
They supply:
- the muscles of the tongue
- muscles surrounding the hyoid bone and
- contribute to swallowing and speech.
The muscles of the tongue includes
- genioglossus,
- hyoglossus
- styloglossus, and
- palatoglossus
The genioglossus is a flat triangular muscle that forms the base by which the tongue is attached.
Since the hypoglossal nerve supplies the the tongue muscle (genioglossus), it would be must affected when mandible severs the hypoglossal nerve.
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