$A$: In $PPP$ $(HMS)$,complete oxidation of one glucose molecule would produce $6CO_2$ molecules and $12$ $NADPH_2$ molecules.
$R$: It occurs in cytoplasm and chloroplast,in presence of $O_2$.

• A
  Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
• B
  Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
• C
  Assertion is correct,but Reason is incorrect.
• D
  Both Assertion and Reason are incorrect.