Match the following compounds with their respective uses:

Compound	Uses
$1. CaCO_3$	$a.$ In purification of coal gas
$2. Ca(OH)_2$	$b.$ As an antacid
$3. CaO$	$c.$ In paper and textile industries
$4. Na_2CO_3 \cdot 10H_2O$	$d.$ In glass and leather industries

• A
  $1-a, 2-b, 3-c, 4-d$
• B
  $1-b, 2-c, 3-a, 4-d$
• C
  $1-b, 2-d, 3-a, 4-c$
• D
  $1-c, 2-a, 3-d, 4-b$