For the fixation of $1$ molecule of $CO_2$ in the Calvin cycle,how many molecules of $NADPH$ and $ATP$ are required?

  • A
    $6$ $NADPH$ and $3$ $ATP$
  • B
    $2$ $NADPH$ and $3$ $ATP$
  • C
    $12$ $NADPH$ and $18$ $ATP$
  • D
    $5$ $NADPH$ and $3$ $ATP$

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The first transitory chemical formed by the reaction between $CO_2$ and $RuBP$ is:

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