Bone which is Pneumatic -a) Maxillaryb) Parietalc) Temporald) Frontale) Ethmoidal: (A) bce, (B) bde, (C) ade, (D) abde
Answer is C. Pneumatic bones are one which contain large air spaces lined by epithelium e.g.: maxilla, sphenoid, ethmoid, Frontal etc. They make the skull light in weight, help in resonance of voice, and act as air conditioning chambers for the inspired air.
Remember
Mastoid is a spongy bone (cancellous or trabecular bone) and not pneumatic bone.