In the adult toad, gaseous exchange takes place through

Explanation

In adult toads, gaseous exchange refers to the process where oxygen is taken in and carbon dioxide is released. Toads are amphibians, which means they can breathe through their skin. When they are in water, they usually take in oxygen through their skin. However, when they are on land, they use their lungs to take in oxygen. The question is asking which organs the toad uses for gaseous exchange. The options are buccal cavity, skin, spiracle, bladder, and lungs. The correct answer is option C, which is buccal cavity, skin and lungs. The buccal cavity is the area in the mouth of the toad, and it is used during respiration to move air into and out of the lungs. The skin is also used for respiration, especially when the toad is in water. The lungs are the primary organ used for respiration when the toad is on land. Therefore, in adult toads, gaseous exchange takes place through the buccal cavity, skin, and lungs. It is important to note that different animals have different methods of respiration, depending on their environment and habitat.