STD 11 - 8. Cell the unit of life — NEET STD 11 Science — Question

$R-$ One $NADH_2$ and $2$ $FADH_2$ are helpful in the formation of $34\, ATP$ molecules.

Reason $(R):$ Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen.

In the light of the above statements, choose the correct answer from the options given below.