Match List-$I$ and List-$II$:

List-$I$	List-$II$
$(a)$ Carbon monoxide	$(i)$ Carcinogenic
$(b)$ Sulphur dioxide	$(ii)$ Metabolized by pyrus plants
$(c)$ Polychlorinated biphenyls	$(iii)$ Haemoglobin
$(d)$ Oxides of nitrogen	$(iv)$ Stiffness of flower buds

Choose the correct answer from the options given below:

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