Match the important chemicals given in Column $(A)$ with the chemical formulae given in Column $(B)$.

Column $(A)$	Column $(B)$
$(a)$ Plaster of Paris	$(i)$ $Ca(OH)_{2}$
$(b)$ Gypsum	$(ii)$ $CaSO_{4} \cdot 1/2 H_{2}O$
$(c)$ Bleaching Powder	$(iii)$ $CaSO_{4} \cdot 2H_{2}O$
$(d)$ Slaked Lime	$(iv)$ $CaOCl_{2}$

• A
  $(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)$
• B
  $(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)$
• C
  $(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)$
• D
  $(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)$