Read the following statements and select the correct option w.r.t cell theory.
(i) All living organisms are composed of cells and products of cells.
(ii) Viruses are exception to cell theory because they are cellular particles.
(iii) All cells arise from pre-existing cells.
(iv) Activities of an organisms are the outcome of sum total of activities and interactions of its constituent cells.
(v) Rudolf Virchow gave final shape to cell theory.

Options

A. Only A correct
B. B and C are correct
C. B,C and D are correct
D. All are correct

Answer

D