Which of the following is correctly named?

Options

A.
B.
C.
D.

Explanation

To determine which of the given compounds is correctly named, we will follow these steps:

### Step 1: Identify the Compounds
We need to look at each compound provided in the options and identify the substituents and the main chain.

### Step 2: Assign Locants
For each compound, we will assign locants (numbers) to the substituents in such a way that the sum of the locants is minimized. This is done by numbering the carbon atoms in the main chain starting from the end closest to the first substituent.

### Step 3: Calculate the Sum of Locants
For each compound, we will calculate the sum of the locants based on our numbering. The goal is to find the arrangement that gives the lowest possible sum.

### Step 4: Name the Compounds
Using the locants and the names of the substituents, we will write the IUPAC names for each compound based on the lowest sum of locants.

### Step 5: Compare with Given Options
Finally, we will compare our calculated IUPAC names with the options provided to determine which one is correctly named.

### Detailed Solution:

1. **First Compound**:
- Assign locants: 1, 2, 3, 4, 5, 6
- Calculate sum: 1 + 1 + 3 + 4 = 8
- Alternative numbering: 1, 2, 3, 4, 5, 6
- Calculate sum: 1 + 2 + 4 = 7
- Correct IUPAC name: 2,4-dinitro-1-chlorobenzene
- **Conclusion**: Option A is incorrect.

2. **Second Compound**:
- Assign locants: 1, 2, 3, 4, 5, 6
- Calculate sum: 1 + 2 + 4 = 7
- Correct IUPAC name: 2-chloro-1-methyl-4-nitrobenzene
- **Conclusion**: Option B is incorrect.

3. **Third and Fourth Compounds**:
- For both compounds, assign locants:
- For C: 1, 2, 3, 4, 5, 6
- Calculate sum: 3 + 1 + 1 = 5
- For D: 1, 2, 3, 4, 5, 6
- Calculate sum: 1 + 3 + 3 = 10
- Since 5 < 10, the correct IUPAC name for option C is confirmed.
- **Conclusion**: Option C is correct.

### Final Answer
The correctly named compound is **Option C**.