Chromotography biology question

hello! can someone explain this question?

the answer should be A)
since lactose and maltose have a sugar in common with sucrose (glucose), they need to have one marker in common with sucrose
maltose = glucose + glucose so it has to be option 3) since all of it’s sugars will have the same weight and travel the same distance in the chromatography
lactose = glucose + galactose so it must have one maker that is different than sucrose