The correct option is A Rhizopus, a mould
Ringworm is a skin infection caused by a fungus. Microsporum, responsible for ringworm disease in human beings belongs to the same kingdom as that of Rhizopus, a mould.
Rhizopus is a genus of common saprophytic fungi on plants and specialized parasites on animals. They are found on a wide variety of organic substrates, including "mature fruits and vegetables", jellies, syrups, leather, bread, peanuts and tobacco.