Which is the correct structure of D-glyceraldehyde ?

Options

A.
B.
C.
D. All of these

Explanation

To determine the correct structure of D-glyceraldehyde, we need to follow these steps:

### Step 1: Identify the molecular formula
D-glyceraldehyde is a simple sugar and has the molecular formula C3H6O3.

### Step 2: Recognize the functional groups
Glyceraldehyde contains an aldehyde group (-CHO) and hydroxyl groups (-OH).

### Step 3: Draw the backbone
Start with a three-carbon backbone since glyceraldehyde has three carbon atoms.

### Step 4: Add the aldehyde group
Place the aldehyde group at one end of the carbon chain. This is typically at the first carbon atom.

### Step 5: Add the hydroxyl group
For D-glyceraldehyde, the hydroxyl group (-OH) is attached to the second carbon atom.

### Step 6: Complete the structure
The third carbon will have a hydroxymethyl group (-CH2OH) attached to it.

### Step 7: Confirm the stereochemistry
In D-glyceraldehyde, the hydroxyl group on the second carbon is on the right side when the molecule is drawn in a Fischer projection. This orientation confirms that it is the D-isomer.

### Final Structure
The final structure of D-glyceraldehyde can be represented as follows:

```
CHO
|
CHOH
|
CH2OH
```