MCQ
$R.Q.$ is represented by
  • A
    $\frac{C}{N}$
  • $\frac{{C{O_2}}}{{{O_2}}}$
  • C
    $\frac{{{O_2}}}{{C{O_2}}}$
  • D
    $\frac{N}{C}$

Answer

Correct option: B.
$\frac{{C{O_2}}}{{{O_2}}}$
b
It’s obvious.

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