Choose the correct statements about photochemical smog :
A. It is a mixture of smoke and fog.
B. London smog was a classical example of photochemical smog.
C. NOX, VOC, SO2 are essential in gradient of photochemical smog.
D. Photochemical smog is formed maximally when Sun is overhead during summer season.
E. Aldehyde, ozone are important constituent of photochemical smog
Choose the most appropriate answer from the following option:
1
A, B and C only
2
B, C, D and E only
3
D and E only
4
C, D and E