Chemistry - Biomolecules Question with Solution | TestHub

B group vitamins and vitamin C are soluble in water, so they are grouped together. Water-soluble vitamins must be supplied regularly in diet because they are readily excreted in urine and cannot be stored (except vitamin ${\mathrm{B}}_{12}$) in our body.

Means vitamin ${\mathrm{B}}_{12}$can not be excreted easily.