Which of the following statement$(s)$ is/are correct?
$(i)$ The Montreal Protocol was signed in $1987$ and became effective in $1989$.
$(ii)$ 'Good' ozone is found in the troposphere.
$(iii)$ Ozone is formed by the action of $UV$ rays on molecular oxygen and degrades into molecular oxygen.
$(iv)$ $CFCs$ are responsible for the imbalance between the production and degradation of ozone.
$(v)$ $DNA$ and proteins of living organisms absorb $UV$ rays.

• A
  $(i), (iv)$ and $(v)$ are correct.
• B
  $(i), (ii), (iii)$ and $(v)$ are correct.
• C
  $(i), (iii)$ and $(iv)$ are correct.
• D
  $(i), (iv)$ and $(v)$ are correct.