[Solution from source] Physarum is a plasmodial slime mould, a saprophytic protist that forms a multinucleate plasmodium. Thiobacillus is a chemosynthetic bacterium, Anabaena a cyanobacterium and Rhizopus a true fungus. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.