Select the option that correctly fills the blanks in any two of them.
The burning of (i) and (ii) results in the release of harmful pollutants into the air, which causes air pollution.
These pollutants lead to respiratory problems like (iii) in humans and contribute to the formation of (iv).
The increased concentration of gases like (v) contributes to the thinning of the (vi).
A (i) Coal, (ii) Petroleum
B (iii) Asthma, (iv) Global warming
C (v) Carbon dioxide, (vi) Ozone layer
D (ii) Sulphur dioxide, (vi) Nitrogen oxide