Step 1: Understanding the Concept:
This question tests knowledge of carbohydrate classification.
Step 2: Detailed Explanation:
Disaccharides (A):
Carbohydrates composed of two monosaccharide units.
Example: Maltose (III) (glucose + glucose).
Thus, A matches with III.
Polysaccharides (B):
Complex carbohydrates composed of many monosaccharide units.
Example: Starch (II) (polymer of glucose).
Thus, B matches with II.
Hexoses (C):
Monosaccharides with six carbon atoms.
Example: Fructose (IV) (C6H12O6).
Thus, C matches with IV.
Pentoses (D):
Monosaccharides with five carbon atoms.
Example: D-ribose (I) (C5H10O5).
Thus, D matches with I.
Step 3: Final Answer:
Thus, the correct matching is A-III, B-II, C-IV, D-I.
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