The correct option is D Slimy mass of multinucleate protoplasm having pseudopodia-like structures for engulfing food, reproduction through fragmentation or zoospores.
The myxomycetes have an interesting life cycle, which includes a wet spore phase and a dry spore phase. When conditions are favorable, they move about like amoebae, resembling primitive animals. When conditions are not favorable they form a resting body (sclerotium) with dry, airborne spores. The myxomycetes are not considered to be true fungi. So option B is correct