Which of the following is $NOT$ a utility of photosynthesis?

  • A
    Synthesis of glucose for almost all consumers
  • B
    Increases the greenhouse effect
  • C
    Provides $O_2$ for the synthesis of the ozone umbrella
  • D
    Provides $O_2$ for cellular respiration

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Column-$I$Column-$II$Column-$III$
$i$. Calvin cycleAlgae$^{14}CO_2$
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