The correct IUPAC name of compound `CH_(3)-CH_(2)-underset(O)underset(||)(C)-underset(CN)underset(|)(CH)-CHO` is

Options

A. 2-cyano-3-oxopentanal
B. 2-formyl-3-oxopentanenitrile
C. 2-cyano-1,3-pentanedione
D. 1,3-dioxo-2-cyanopentane

Explanation

To determine the correct IUPAC name of the compound `CH₃-CH₂-C(=O)-C≡N-CH=CHO`, we will follow the systematic approach for naming organic compounds according to IUPAC rules.

### Step-by-Step Solution:

1. **Identify Functional Groups**:
The compound contains three functional groups:
- Aldehyde (−CHO)
- Ketone (C=O)
- Nitrile (−C≡N)

2. **Determine the Priority of Functional Groups**:
According to IUPAC nomenclature, the priority order for functional groups is:
- Nitrile (highest priority)
- Aldehyde
- Ketone (lowest priority)

3. **Number the Carbon Chain**:
Start numbering the carbon chain from the end nearest to the highest priority functional group (nitrile).
- The carbon chain is numbered as follows:
- C1: CN (nitrile)
- C2: CH (aldehyde)
- C3: C=O (ketone)
- C4: CH2
- C5: CH3

So, the numbering is: 1 (C≡N), 2 (CHO), 3 (C=O), 4 (CH2), 5 (CH3).

4. **Assign Locants and Name the Functional Groups**:
- The nitrile group is at position 1.
- The aldehyde group is at position 2 (2-formyl).
- The ketone group is at position 3 (3-oxo).

5. **Combine the Names**:
- The base name is derived from the longest carbon chain, which has 5 carbons (pentane).
- Combine the names of the functional groups with their locants:
- The full name will be: 2-formyl-3-oxo-pentanenitrile.

6. **Final IUPAC Name**:
The correct IUPAC name of the compound is **2-formyl-3-oxopentanenitrile**.