Correct option is C
✅ (c)
Trehalose: • Main blood sugar in insects (found in hemolymph). • Provides energy for flying and other metabolic activities. • A disaccharide composed of two glucose units.
❌ (a)
Glucose: • Not the principal sugar in insect blood.
❌ (b)
Mannitol: • Sugar alcohol, not the main insect sugar.
❌ (d)
Mannose: • A sugar involved in plant metabolism, not common in insect hemolymph.