According to recent reports on acid rain,industrial cities are affected by atmospheric pollution due to which of the following?

• A
  Excessive release of $NO_2$ and $SO_2$ from fossil fuel combustion.
• B
  Excessive release of $CO_2$ due to burning of wood and charcoal,deforestation,and increase in animal population.
• C
  Excessive release of $NH_3$ from industrial gases and coal gas.
• D
  Excessive release of $CO$ into the atmosphere from incomplete combustion of coke,charcoal,and other carbonaceous fuels in oxygen-deficient environments.