slime moulds under favourable conditions form an aggregation called plasmodium
and .....
also the plasmodium come under sporozoans.... ?can anyone plz help me to understand this clearly..?

Actually the plasmodium in case of slime moulds is the body of slime moulds that bears fruiting bodies at their tips. While plasmodium in case of sporozoans is an organism which causes malaria. It is an example of sporozoans. Both are completely different!