Kristyyyyyyy

Hi, I think it involves both the light-dependent reaction and in-independent reaction of photosynthesis. 

Plant A is supplied with : 

Nomal Carbon dioxide and Water, laballed with radioactive oxygen atoms 

Plant B is supplied with:

Carbon dioxide,labelled with radioactive oxygen atoms and Normal Water 

Which photosynthetic product of Plant A will contain radioactivity and which photosynthetic product of Plant B Will contain Radioactivity? Predict with reasons.