Which of the following names is correct for
`underset(CHO)underset(|)(C)H_(2)-underset(CHO)underset(|)(C)H-underset(CHO)underset(|)(C)H_(2)`?

Options

A. 3-Formylpentane-1,3-dial
B. 1,2,3-Triformylpropane
C. 2-Formylmethylbutane-1,4-dial
D. Propane-1,2,3-tricarbaldehyde.

Explanation

To determine the correct IUPAC name for the given compound, we will follow these steps:

### Step 1: Identify the Parent Chain
The first step in naming an organic compound is to identify the longest continuous carbon chain that contains the highest number of functional groups. In this case, we need to find the longest chain that includes all the functional groups (aldehyde groups).

**Hint:** Look for the longest continuous chain of carbon atoms that includes the functional groups.

### Step 2: Number the Carbon Atoms
Once the parent chain is identified, we need to number the carbon atoms in such a way that the functional groups receive the lowest possible numbers. In this compound, we have three aldehyde groups.

**Hint:** Start numbering from the end of the chain closest to the first functional group.

### Step 3: Determine the Suffixes
Since we have aldehyde groups, we will use the suffix "-al" for the aldehyde. However, since there are multiple aldehyde groups, we will use the prefix "tricarbaldehyde" to indicate three aldehyde groups.

**Hint:** Remember that for aldehydes, if the carbon of the aldehyde is not part of the main chain, we use "carbaldehyde" as a suffix.

### Step 4: Combine the Information
Now that we have the parent chain identified as a propyl chain (3 carbon atoms) and we know there are three aldehyde groups, we can combine this information. The correct name will be "tricarbaldehyde" since all three aldehyde groups are on the terminal carbons of the main chain.

**Hint:** Use the prefix for the number of functional groups along with the base name derived from the parent chain.

### Final Answer
The correct IUPAC name for the compound is **"tricarbaldehyde"**.