Answer is: b) carbon-dioxide (CO₂).
Glucose (C₆H₁₂O₆) or blood sugar is monosaccharide and organic chemical compound.
Ethane (C₂H₆) is alkane, alkanes are organic chemical compounds.
Stearic acid or octadecanoic acid (C₁₈H₃₆O₂) is saturated fatty acid, also organic chemical compound.
