Which of the following statements are correct
I. Human RBC is about 7.0 μm in diameter
II. Cytoplasm is the main arena of cellular activities
III. The shape of the cells may vary with the function they perform
IV. Various chemical reactions occur in cytoplasm to keep the cell in the living state
Choose the correct option
a) I, III and IV b) I, IV and II c) I, II, III and IV d) II, III and IV