Question

multiple choice question
what part of the ethmoid bone extends into the cranial cavity as a sharp triangular process?
mastoid process
crista galli
cribriform plate
perpendicular plate
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Explanation:

The crista galli is a sharp, triangular process of the ethmoid bone that extends into the cranial cavity. The mastoid process is part of the temporal bone. The cribriform plate is a part of the ethmoid bone but is not a sharp triangular process extending into the cranial cavity. The perpendicular plate of the ethmoid bone forms part of the nasal septum.

Answer:

B. Crista galli