Final answer:
The bone with cribriform foramina is the ethmoid bone, where small nerve branches from the olfactory areas of the nasal cavity pass through these openings to enter the brain.
Step-by-step explanation:
The bone that has cribriform foramina is the ethmoid bone. The cribriform foramina are small openings in the cribriform plates of the ethmoid bone that allow nerve branches from the olfactory areas of the nasal cavity to enter the brain. The ethmoid bone is an unpaired bone located at the midline within the central skull, forming the upper nasal septum with its perpendicular plate and giving rise to the superior and middle nasal conchae. The bone listed in the options that corresponds to this description is B) ethmoid.