Final answer:
Tympany from percussion is expected to be found over the lungs because they are air-filled organs, while solid organs like the liver and spleen, or fluid-filled structures such as the heart, typically produce a dull sound.
Step-by-step explanation:
Tympany from percussion is an expected finding when percussing over an area that is filled with air. Therefore, the correct answer to the question of where tympany from percussion is expected to be found is c) Over the lungs. This is because the lungs are air-filled organs, and the percussion of air-filled structures typically yields a tympanitic sound. In contrast, percussion over solid organs like the liver and spleen, or fluid-filled structures such as the heart, would not produce tympany but rather dullness due to the density of these tissues. Tympany is thus most commonly associated with the air-filled spaces within the thoracic cavity and not with the solid or fluid-filled organs like the liver, spleen, or heart.