Which one of the following pairs is not correctly matched

Options

A. `gt C=O overset("Clemensen' s reduction")to gt CH_2`
B. `gt C=Ooverset("Wolff -Kishner reduction")to gt CHOH`
C. `-COCl overset("Rosenmund' s reduction")to CHO`
D. `-C -= N overset("Stephen' s reduction")toCHO`

Explanation

To determine which pair is not correctly matched, we need to analyze the pairs provided in the question. Since the specific pairs are not listed in the question, we will discuss some common reactions associated with aldehydes and ketones and identify potential mismatches.

### Step-by-Step Solution:

1. **Identify Common Reactions for Aldehydes and Ketones**:
- Aldehydes and ketones can undergo various reactions, including reduction, oxidation, and nucleophilic addition.
- Common reducing agents include lithium aluminum hydride (LiAlH4) and sodium borohydride (NaBH4), which reduce carbonyl compounds to alcohols.

2. **Understand the Types of Reactions**:
- **Clemensen Reduction**: This reaction reduces carbonyl groups (C=O) to methylene groups (C-H2) using zinc amalgam and hydrochloric acid.
- **Wurtz Reaction**: This reaction typically involves the coupling of alkyl halides using sodium metal, which is not directly related to aldehydes or ketones.
- **Grignard Reaction**: Involves the addition of Grignard reagents to carbonyl compounds, leading to alcohols.

3. **Evaluate Each Pair**:
- If a pair suggests that a reaction typically associated with aldehydes is applied to ketones or vice versa, it may be incorrectly matched.
- For example, if a pair states that "Clemensen Reduction can be used for ketones," this is correct, but if it states "Wurtz Reaction for aldehydes," this is incorrect.

4. **Select the Incorrect Pair**:
- After evaluating the pairs, identify which one does not align with the known chemistry of aldehydes and ketones.

5. **Conclusion**:
- Based on the analysis, select the pair that does not correctly match the reactions with the respective compounds.

### Final Answer:
Without the specific pairs provided in the question, we cannot definitively state which one is incorrect. However, based on the common knowledge of reactions, if a pair includes a reaction that is not applicable to the compound in question, that would be the incorrect match.