An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent and gives positive iodoform test. The compound is

Options

A.
B.
C.
D.

Answer

To solve the problem, we need to analyze the information given about the organic compound and the reactions it undergoes. Let's break it down step by step:

### Step 1: Analyze the Reagents
1. **Neutral Ferric Chloride (FeCl3)**: This reagent is used to identify phenols. A positive reaction would indicate the presence of a phenolic compound, which would form a colored complex with FeCl3.
2. **Fehling Solution**: This reagent is used to identify aldehydes. A positive reaction would result in a brick-red precipitate of cuprous oxide (Cu2O).
3. **Grignard Reagent (RMGX)**: This reagent reacts with carbonyl compounds (aldehydes and ketones) to form alcohols.
4. **Iodoform Test**: This test identifies methyl ketones or compounds that can be oxidized to form a methyl ketone, resulting in the formation of a yellow precipitate of iodoform (CHI3).

### Step 2: Analyze the Compound's Behavior
- The compound **does not react with neutral ferric chloride**: This indicates that the compound is not a phenol.
- The compound **does not react with Fehling solution**: This indicates that the compound is not an aldehyde.
- The compound **reacts with Grignard reagent**: This suggests that the compound contains a carbonyl group (either aldehyde or ketone).
- The compound **gives a positive iodoform test**: This indicates that the compound contains a methyl ketone structure or a secondary alcohol that can be oxidized to a methyl ketone.

### Step 3: Evaluate the Options
Now, we need to evaluate the given options based on the above analysis.

1. **Option 1**: Contains a phenolic structure (reacts with FeCl3) - **Not valid**.
2. **Option 2**: Contains an aldehyde (reacts with Fehling solution) - **Not valid**.
3. **Option 3**: Contains a ketone but does not have a methyl group adjacent to the carbonyl - **Not valid**.
4. **Option 4**: Contains a structure that can react with Grignard reagent and has a methyl ketone - **Valid**.

### Conclusion
Based on the analysis, the organic compound that meets all the criteria is **Option 4**.