Answer:
The correct answer is option - C. skin cancer.
Explanation:
A carcinogen is a substance or agent that influences carcinogenesis which is the cancer-promoting process or forming cancer in an individual that experiencing these carcinogens.
In this experiment there is only one condition can be developed by the influence of the carcinogen in the air which is skin cancer in the frogs as a carcinogen has the ability to damage and disrupt the metabolic reaction in the cell.
Thus, the correct answer is - C. skin cancer.