JEE Advanced levelOne or more correct optionsDifficulty 3 of 3bm043
Which sugars give the same osazone as D-glucose?
AD-mannose
BD-fructose
CD-galactose
DD-arabinose
Answer: A, B
Osazone formation uses C-1 and C-2, so sugars with identical C-3 to C-5 configuration give the same osazone. Mannose (C-2 epimer) and fructose do. Galactose differs at C-4 and arabinose has only five carbons.