What is the primary basis for classification within the kingdom $Protista$?

The presence of cilia, an oral groove, and food vacuoles, and the absence of chloroplasts in a unicellular organism indicate that the organism carries on

Chrysophytes,euglenoids,dinoflagellates,and slime molds are included in the kingdom ............ .

Select the incorrect statement regarding the spores of slime molds.

In $Paramecium$,genetic information is contained in:

The given statements are some characters of a particular group of Kingdom $Protista$.
$(i)$ Most of them are freshwater organisms found in standing water.
$(ii)$ They have a protein-rich layer (called pellicle) which makes their body flexible.
$(iii)$ They have two flagella,a short and a long one.
$(iv)$ Though they are photosynthetic in the presence of sunlight,but in the absence of sunlight they behave like heterotrophs by predating on other smaller organisms.
Identify the correct group on the basis of these characters.