$A -$ $A$ cell is a closed compartment for all substances.
$R -$ Plasma membrane of a cell is selectively permeable.

• A
  Both $A$ and $R$ are true.
• B
  Both $A$ and $R$ are false.
• C
  $A$ is true,but $R$ is false.
• D
  $A$ is false,but $R$ is true.