Final answer:
C. Yankauers. The most appropriate catheter tip for suctioning the mouth is Yankauers, which are rigid tipped catheters commonly used for suctioning oral secretions.
Step-by-step explanation:
The most appropriate catheter tip for suctioning the mouth is C. Yankauers. Yankauers are rigid tipped catheters that are commonly used for suctioning oral secretions. They are designed to reach deep into the oral cavity and have a large opening to effectively remove secretions.