Which one of the following genera does not belong to the ring worm?

The correct answer is Option (1) → Trichoderma

Ringworm is not caused by a worm. It is a fungal disease of the skin, nails and scalp. It shows as dry, scaly lesions with intense itching. Heat and moisture help the fungi grow, so they thrive in skin folds such as the groin.

(1) Trichoderma — Not a genus of ringworm fungi. It is a free-living fungus found in the root ecosystem. It is used as a biocontrol agent against plant pathogens.

(2) Trichophyton — A genus of ringworm fungi.

(3) Epidermophyton — A genus of ringworm fungi.

(4) Microsporum — A genus of ringworm fungi.

NCERT Extract:
Common Diseases in Humans – “… Many fungi belonging to the genera Microsporum, Trichophyton and Epidermophyton are responsible for ringworms which is one of the most common infectious diseases in man.”
Microbes as Biocontrol Agents – “… Trichoderma species are free-living fungi that are very common in the root ecosystems.”