Classical smog occurs in which of the following atmospheres?
- ADry humid atmosphere
- BNaturally humid atmosphere
- CCool humid atmosphere
- DBoth $A$ and $B$
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$(S_1) \ CO_2$ is a greenhouse gas.
$(S_2)$ Classical smog contains smoke,fog,and a high concentration of $SO_2$.
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$(S_4)$ Drinking water should have a high $B.O.D.$
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$(S_1) \ CO_2$ is a greenhouse gas.
$(S_2)$ Classical smog contains smoke,fog,and a high concentration of $SO_2$.
$(S_3) \ DDT$ is biodegradable.
$(S_4)$ Drinking water should have a high $B.O.D.$
Which is the correct sequence of true $(T)$ or false $(F)$ regarding the above statements?
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