As 1st and second carbon are involved in osazone formation so carbohydrate having same configuration at 3,4,5,6 position will give same osazone..
If it is C2 epimer it also gives same osazone as C2 goes in osazone formation
But won't the stereochemistry of the two compunds formed differ?
C2 epimer means configuration change at C2 omly
Oh sorry,i got my mistake