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Subject :NSO    Class : Class 6

Refer to the given flow chart.

Identify P, Q and R and select the incorrect statement.

ADuring the process of burning, P is used up and Q is given out.
BAutotrophs could be the only source of P in the atmosphere.
CQ is used in fire extinguishers as it extinguishes fire.
DIn atmospheric air, R is present in highest percentage whereas P is present in lowest percentage.

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