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The correct option is Option A. 
The respiratory balance sheet of aerobic respiration of one molecule of glucose can be explained as under:
Step No. of ATP produced
Glycolysis 2NADH2= 2 x 3 = 6ATP
2ATP (Substrate level)
Total = 8ATP
Linking reaction
Pyruvate to Acetyl coenzyme A
2NADH2= 2 x 3=6 ATP
Kreb's cycle 6NADH 2​= 6 x 3=18ATP
2FADH= 2 x 2=4ATP
​2ATP (Substrate level)
Total= 24ATP
Total of all steps 8+6+24= 38ATP

ETS helps to release and utilise the energy stored in NADH2 and FADH2 synthesised above and converts them to ATPs. During ETS, the number of ATP produced depends on the nature of electron donor. In this reaction, the NADH gives 3 molecules of ATP while the FADH2 give two molecules of ATP.

Hence, the net gain of 38ATP molecules occurs during aerobic respiration of one molecule of glucose.​ Since, 2 ATP are used up in glycolysis hence, net gain is of 36 ATP.

Hope this information will clear your doubts about the balance sheet of ATP production during aerobic respiration of glucose. 
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