The correct option is D Mycoplasma
Nostoc is a cyanobacteria and has a rigid cell wall like other eubacteria.
Mycoplasma fall under eubacteria but they completely lack cell wall. Also, they are the smallest living cells known and can survive without oxygen.
Aspergillus is a part of Ascomycetes in Kingdom Fungi. Members of Kingdom Fungi have cell walls that are made up of chitin and polysaccharides.
Funaria is a Bryophte in Kingdom Plantae and as all the members of Kingdom Plantae, it also has cell wall made up of cellulose.