Which of the following statement is correct?

Options

A. The presence of chiral carbon is essential condition for enantiomerism.
B. Functional isomerism is a kind of stereoisomersim.
C. The compounds containing one chiral carbon only are always chiral.
D. All statements are wrong.

Explanation

To determine which of the statements regarding isomerism is correct, we will analyze each statement one by one.

### Step 1: Analyze Statement 1
**Statement 1:** The presence of chiral carbon is an essential condition for enantiomerism.

- **Analysis:** This statement is incorrect. While chiral carbons are a common source of enantiomers, there are compounds that can exhibit enantiomerism without having a chiral carbon. For example, substituted allenes and certain non-planar biphenyls can be chiral without any chiral carbons.

### Step 2: Analyze Statement 2
**Statement 2:** Functional isomerism is a kind of stereoisomerism.

- **Analysis:** This statement is also incorrect. Functional isomerism is a type of structural isomerism, not stereoisomerism. Stereoisomerism includes conformational and configurational isomerism, while functional isomerism pertains to compounds with the same molecular formula but different functional groups.

### Step 3: Analyze Statement 3
**Statement 3:** The compounds containing one chiral carbon only are always achiral.

- **Analysis:** This statement is incorrect. Compounds with one chiral carbon are always chiral. For example, lactic acid has one chiral carbon and exhibits optical activity, meaning it has enantiomers.

### Step 4: Analyze Statement 4
**Statement 4:** All statements are wrong.

- **Analysis:** Since the first three statements are indeed incorrect, this statement is correct.

### Conclusion
The correct answer is that all the previous statements (1, 2, and 3) are wrong, making Statement 4 the correct choice.

### Final Answer
The correct statement is: **All statements are wrong (Statement 4).**

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