How many $NADH$ and $FADH_2$ are formed when one molecule of citric acid enters the $TCA$ cycle?

  • A
    $2 \, NADH$ and $1 \, FADH_2$
  • B
    $4 \, NADH$ and $2 \, FADH_2$
  • C
    $3 \, NADH$ and $1 \, FADH_2$
  • D
    $5 \, NADH$ and $2 \, FADH_2$

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How many $ATP$ molecules are produced directly in one $Krebs$ cycle per acetyl-$CoA$ molecule?

Match the compounds given in column-$I$ with the number of carbon atoms present in them which are listed under column-$II$. Choose the answer which shows the correct combination of alphabets of the two columns.
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$A$. Oxaloacetate$p$. $6-C$ compound
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