The imperfect fungi which are the decomposers of litter and help in mineral cycling belong to Ascomycetes, Deuteromycetes, Basidiomycetes, or Phycomycetes?

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to Deuteromycetes. Many fungi have no sexual stage. Mycologists have traditionally called such fungi deuteromycetes or imperfect fungi (term perfect is referred to the sexual stages of life cycles). Imperfect fungi produce neither ascus nor basidia. Deuteromyceted don't fit into the commonly placed classifications of fungi. So the correct answer is Deuteromycetes.