The cell wall in plants is triple layered. The sequence of cell wall layers from outside to inside is
 

• A

  middle lamella$\to$ primary cell wall$\to$ secondary cell  wall

• B

  secondary cell wall $\to$ primary cell wall$\to$ middle  lamella

• C

  primary cell wall$\to$ middle lamella $\to$secondary cell  wall

• D

  primary cell wall$\to$ secondary cell wall$\to$ middle lamella