$A$ - Selaginella and Salvinia produce heterospores.
$R$ - Cones (strobili) are developed in Selaginella and Equisetum.

• A
  $A$ and $R$ are both correct.
• B
  $A$ and $R$ are both incorrect.
• C
  $A$ is correct,$R$ is incorrect.
• D
  $A$ is incorrect,$R$ is correct.