Which one among the following pairs of diseases and their types is not correctly matched?

Polio is caused by the poliovirus, so it is correctly described as a viral disease. Athlete's foot (tinea pedis) is a skin infection caused by dermatophyte fungi, correctly classified as fungal. Whooping cough is caused by the bacterium Bordetella pertussis, correctly classified as bacterial. Dengue fever, however, is caused by the dengue virus (a flavivirus) transmitted by Aedes mosquitoes, so it is a viral disease — calling it 'non-viral' is incorrect. Hence option (c) is the wrongly matched pair.