The correct option is C relative
The empirical formula of a compound is a formula that shows the ratio of elements present in the compound, i.e., relative number of atoms present. The ratios are denoted by subscripts next to the element symbols.
Glucose has a molecular formula of C6H12O6. It contains 2 moles of hydrogen for every mole of carbon and oxygen. Therefore, the empirical formula for glucose is CH2O.