Question
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Pneumatic bones are found in
 A. Domestic lizard
 B. Tadpole of frog
 C. Flying lizard
 D. Pigeon

Answer
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Hint: Pneumatic bones are hollow. This helps to remove unnecessary weight which can hamper the flight dynamics. The air you breathe passes through a series of pockets and channels in the pneumatic bones of your sinuses

Complete answer:
Pneumatic bones are present in birds. And due to the presence of pneumatic bones, birds can fly in the air.
The bones of birds have less weight than those of mammals. Some of the bones are hollow and they resemble part of the avian respiratory system. The bones, are called the pneumatic bones, which includes the skull, humerus, clavicle, keel, pelvic girdle, and lumbar and sacral vertebrae

Additional information:
Pneumatic bones are important for the respiration of birds. These are hollow bones that are connected to the respiratory system of birds and are important for birds to breathe. Some of the pneumatic bones are the skull, humerus, collarbone, keel (sternum), pelvic girdle, and lumbar and sacral vertebrae. Pneumatic bones are not only present in birds. To demonstrate this fact, breathe deeply through your nose. The air you breathe passes through a series of pockets and channels in the pneumatic bones of your sinuses.

So, the correct answer is Pigeon

Note: In birds, respiration has developed a particular path. Birds have specialized bones that are pneumatic and they are filled with air sacs which provide a continuous flow of respiration through their bodies. The pneumatic bones of birds are hollow, the hollow spaces are filled with air, providing structural rigidity and considerably reduced weight. Humans also have pneumatized bones in the skull, like the sinus cavities in the frontal area.