The empirical formula of sucrose is:

Disaccharide sugar sucrose is made up of the subunits of glucose and fructose. Either sugarcane or sugar beet is used to extract and refine sucrose for human use.

The empirical formula is the smallest positive integer ratio of the atoms present in the compound.

Now, the chemical formula of sucrose is ${\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}$.

Knowing the molecular formula and understanding the relationship from the empirical formula ; (Prime numbers don't have any divisors, thus if the molecular formula has any, the empirical formula will always be equal to the molecular formula and the molecular formula cannot be further reduced to the smallest ratio).

$Molecular formula = n \times Empirical formula$

In the chemical formula, the C, H and O are present in the ratio 12:22:11. This ratio can’t be further reduced to a smaller ration. Thus, the empirical formula of sucrose is ${\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}$.

Thus, correct option is C.