Consider the following statements with respect to pollution.
A. To control air pollution problems, by the end of 2002 all the buses of Delhi were converted to run on unrelated petrol
B. Electrostatic precipitator can remove over 99% particulated matter present in the exhaust from a thermal power plant.
C. It is possible to estimate the amount of organic matterin sewage water by measuring BOD.
Of the above statements:

Options

A. A alone is correct
B. B alone is correct
C. C alone is correct
D. B and C are correct

Answer

D