Match Column-$I$ with Column-$II$.

Column-$I$	Column-$II$
$(a)$. $A$ vector of disease	$(i)$ Bombyx
$(b)$. $A$ gregarious pest	$(ii)$ Limulus
$(c)$. $A$ living fossil	$(iii)$ Locusta
$(d)$. An economically important insect	$(iv)$ Culex

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