The COD values of three water samples A,B and C are 60 ppm, 990 ppm and 120 ppm respectively. The most polluted water sample is

The COD values of three water samples A,B and C are 60 ppm, 990 ppm an

1.	The COD values of three water samples A,B and C are 60 ppm, 990 ppm and 120 ppm respectively. The most polluted water sample is
Answer» A B C All are EQUALLY POLLUTED ANSWER :C