Consider the list of the following compounds. ${\mathrm{CCl}}_2{\mathrm{F}}_2\left(\mathrm{g}\right),{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right) ,{\mathrm{CH}}_4\left(\mathrm{g}\right), {\mathrm{CO}}_2\left(\mathrm{g}\right), {\mathrm{N}}_2\left(\mathrm{g}\right), {\mathrm{O}}_2\left(\mathrm{g}\right)$

How many of the gases in the above list are green house gases

• A

  2

• B

  3

• C

  1

• D

  4