The true sequence for the cell envelope from outer to inner in prokaryotes is:

• A
  Cell wall $\rightarrow$ cell membrane $\rightarrow$ glycocalyx
• B
  Cell membrane $\rightarrow$ glycocalyx $\rightarrow$ cell wall
• C
  Glycocalyx $\rightarrow$ cell membrane $\rightarrow$ cell wall
• D
  Glycocalyx $\rightarrow$ cell wall $\rightarrow$ cell membrane