Consider the following statements.
I. All prokaryotic organisms were grouped together under kingdom -Monera.
II. The unicellular eukaryotic organisms were placed in kingdom -Protista.
III. Chlorella and Chlamydomonas , both have cell walls and are placed in kingdom protista.
IV. Paramecium and Amoeba lack cell walls.
A. Only I and II are correct
B. Only I is correct
C. Only III and IV incorrect
D. All statements are correct.
