A) maxilla
B) dentary
C) squamosal
D) collumella
Correct Answer: B
Solution :
Lower jaw of mammal is made up of single bone dentary and upper jaw is made up of pterygoids, palatines maxillae, premaxillae and jugals. Collumella auris or stapes are stirrup shaped bones which are situated in tympanic cavity. Squamosal : It is a hammer like bone; which helps in the attachment of upper jaw with cranium.
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