In aqueous solution, glucose remains as:

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(D) In an aqueous solution, glucose exists in a dynamic equilibrium between its open-chain form and two cyclic (pyranose) forms, known as $\alpha-D-(+

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In all three forms in equilibrium

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(D) In an aqueous solution, glucose exists in a dynamic equilibrium between its open-chain form and two cyclic (pyranose) forms, known as $\alpha-D-(+)-glucopyranose$ and $\beta-D-(+)-glucopyranose$. The equilibrium mixture consists of approximately $36\%$ of $\alpha$-anomer, $64\%$ of $\beta$-anomer, and a very small amount (about $0.02\%$) of the open-chain form. Therefore, glucose exists in all three forms in equilibrium.

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