The fungal disease among the options is (c) Ringworm. Powdery mildew, typically affecting plants, is caused by fungal pathogens. Eczema, a skin condition, results from various factors such as genetics and environmental triggers, not fungi. Elephantiasis, caused by parasitic worms transmitted by mosquitoes, isn’t fungal. Ringworm, contrary to its name, is a fungal infection of the skin or scalp. It’s characterized by circular, red, scaly patches that resemble a ring, caused by dermatophyte fungi. Proper antifungal treatment is essential to manage and resolve ringworm infections effectively.