Statement-I : (see structures) and (see structure) are two anomers of D-(+)-glucose.
Statement-II : The open chain forms of D-glucose and D-fructose contain three similar chiral carbons at C₃, C₄ and C₅.
In the light of the above statements, choose the correct answer from the options given below :
(A)Both Statement-I and Statement-II are true.✓ Correct
(B)Both Statement-I and Statement-II are false.
(C)Statement-I is true but Statement-II is false.
(D)Statement-I is false but Statement-II is true.
Answer: (A)
Solution
The two cyclic structures are identical D-glucopyranose rings that differ only in the orientation of the −OH at the anomeric carbon C1, which is exactly the relationship that defines a pair of anomers, so Statement-I is true. In the open-chain forms, D-glucose (an aldohexose) is chiral at C2,C3,C4,C5 while D-fructose (a 2-ketohexose) is chiral at C3,C4,C5, and the configurations at C3,C4,C5 are identical in the two sugars, so Statement-II is true. Both Statement-I and Statement-II are true.
JEE Main · 2026 · 05 Apr 2026 · Shift 2 · Single correct option
