Please experts provide answer to my question please

Dear student 
Please find your answer below to the asked query 

Option c is correct. 
As lips inner surface has mucuous membrane. 

Palate, the roof of the mouth, separating the oral and nasal cavities.

The hyoid bone (lingual bone or tongue-bone ) is a horseshoe-shaped bone

The interior surface of the lips is lined with a moist mucous membrane.

The oral cavity is lined by a mucous membrane  consisting of a stratified squamous epithelium, which may or may not be keratinized.

Regards