In solution glucose exist in how many isomeric forms?

Explanation

To determine how many isomeric forms glucose exists in solution, we can follow these steps:

### Step 1: Identify the Structure of Glucose
Glucose is a simple sugar (monosaccharide) with the molecular formula C6H12O6. It can exist in different structural forms, including an open-chain form and cyclic forms.

### Step 2: Recognize the Isomeric Forms
In solution, glucose primarily exists in three isomeric forms:
1. **D-Glucose**: This refers to the configuration of the hydroxyl group (-OH) on the penultimate carbon (the second last carbon in the chain).
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