Final answer:
The medial pterygoid plate, as part of the sphenoid bone on the inferior skull, forms the posterior, lateral walls of the nasal cavity, making statement C correct.
Step-by-step explanation:
The medial pterygoid plate is a paired, flattened bony projection located on the inferior aspect of the skull, which is a part of the sphenoid bone. Focusing on the anatomy of the skull, these plates serve an important structural role. Each medial pterygoid plate contributes to forming the posterior, lateral walls of the nasal cavity, unlike the lateral pterygoid plates, which are larger and serve as attachment sites for chewing muscles in the infratemporal space.
This anatomy is crucial as it helps support the nasal structures and the function of the nasal cavity. Therefore, the correct statement in relation to the medial pterygoid plate is that it is part of the nasal cavity, and the accurate answer to the multiple-choice question is (C) The medial pterygoid plate is part of the nasal cavity.