Which of the following chemicals are used to manufacture methyl isocyanate that caused the $Bhopal$ $Tragedy$?
$(i)$ $Methylamine$
$(ii)$ $Phosgene$
$(iii)$ $Phosphine$
$(iv)$ $Dimethylamine$

• A
  $(i)$ and $(iii)$
• B
  $(iii)$ and $(iv)$
• C
  $(i)$ and $(ii)$
• D
  $(ii)$ and $(iv)$