Match the following compounds in Column-$I$ with their products of heating effect in Column-$II$:

Column-$I$ (Compound)	Column-$II$ (Products of heating effect)
$a$. $LiNO_3$	$P$. Metal oxide
$b$. $FeSO_4 \cdot 7H_2O$	$Q$. Paramagnetic gas
$c$. $NaHCO_3$	$R$. Acidic gas
$d$. $BeCO_3$	$S$. Evolved gas has same number of $\sigma$ and $\pi$ bonds

• A
  $a-P, Q, R; b-P, R, S; c-R, S; d-P, R, S$
• B
  $a-P, Q, R; b-P, R; c-R, S; d-P, R$
• C
  $a-P, Q, R; b-P, R, S; c-R, S; d-P, R$
• D
  $a-P, Q, R; b-P, R, S; c-R; d-P, R$