See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

All Monosaccharides are reducing sugars. (I) is Mannose and is a C-2 epimer of glucose. The formation of osazone involves C-1 and C-2. Glucose, Mannose and Fructose have identical configuration at C-3, C-4 and C-5. Hence, they form the same osazone.