Pick out the wrong statement

A. Low ozone layer thickness in polar regions is due to cold climatic conditions

B. Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine

C. Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine

D. Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing minamate disease

Answer: Option C