Indicate the stages where meiosis and mitosis occur $(1, 2$ or $3)$ in the flow chart: Megaspore mother cell $\xrightarrow{1}$ Megaspores $\xrightarrow{2}$ Embryo sac $\xrightarrow{3}$ Egg.

• A
  $1 = \text{Meiosis}, 2 = \text{Mitosis}, 3 = \text{None}$
• B
  $1 = \text{Mitosis}, 2 = \text{Meiosis}, 3 = \text{Mitosis}$
• C
  $1 = \text{Meiosis}, 2 = \text{Mitosis}, 3 = \text{Mitosis}$
• D
  $1 = \text{Mitosis}, 2 = \text{Mitosis}, 3 = \text{Meiosis}$