Which of the following statements explains why side effects…

Which of the following statements explains why side effects are delayed after irradiation in normal tissues? Select two.   I. Cells in most normal tissues die through apoptosis after irradiation. II. Cells in most normal tissues are considered hypoxic by nature. III. Cells in most normal tissues have a mixed pattern of FSU arrangement. IV. Cells in most normal tissues die a mitotic death after irradiation. V. Side effects in normal tissues are deterministic effects and therefore have a dose threshold. VI. Side effects in normal tissues are stochastic effects and therefore have a dose threshold.