The correct option is D C6H12O6+H2SO4(conc)→6C+6H2O+H2SO4(dil)
The balanced chemical equation is C6H12O6+H2SO4(conc)→6C+6H2O+H2SO4(dil) . Concentrated sulphuric acid reacts with one molecule of glucose to form 6 carbon atom, 6 water molecule and one molecule of dil H2SO4 So the reaction is perfectly balanced. Hence the correct option is D