Which one of the following is a slime mould?

Physarum polycephalum belongs tophylum Amoebozoa. $P$. polycephalum, often referred to as the "many-headed slime," is a slime mould that inhabits shady, cool, moist areas, such as decaying leaves and logs. Thiobacillus, Anabaena and Rhizopus are prokaryotes.