Answer:
An inorganic compound is a compound which lacks carbon-hydrogen bond.I guess u`ve not mentioned the full question..
i believe that the question is
1.methane, which is made of carbon and hydrogen
2.glucose, which is a sugar made by plants
3.sodium chloride, which is a salt
4.human DNA, which is a molecule in cell.
the answer is then 3, sodium chloride/salt
