This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Which of the following are constituents of the cranial base? 
Select and explain. 
A. Maxilla, mandible and cranial vault, B. Ethmoid, sphenoid and occipital, C. Palatal, nasal and zygoma, D. Frontal and parietal
B: Ethmoid, sphenoid and occipital
Answer: B: Ethmoid, sphenoid and occipital 
Explanation: The cranial base includes from anterior to posterior, the ethmoid, sphenoid, and occipital  bone.