Which of the following compounds will give isocyanide on reaction
with `CHCl_(3)+KOH` ?

Options

A.
B.
C.
D.

Explanation

To determine which of the given compounds will yield isocyanides upon reaction with chloroform (CHCl₃) and potassium hydroxide (KOH), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reaction**: The reaction in question is known as the carbylamine reaction, which is specifically used to test for primary amines. The general reaction can be represented as:
\[ R-NH_2 + CHCl_3 + 3 KOH \rightarrow R-N=C + 3 KCl + 3 H_2O \]
Here, \( R-NH_2 \) represents a primary amine, and the product \( R-N=C \) is the corresponding isocyanide.

2. **Recognize the Type of Amines**: Only primary amines (1° amines) will react with this reagent to form isocyanides. Secondary (2°) and tertiary (3°) amines do not undergo this reaction.

3. **Analyze the Given Compounds**:
- Check each compound to see if it contains a primary amine group (–NH₂).
- If the compound has a primary amine, it will give an isocyanide upon reaction with CHCl₃ and KOH.

4. **Identify the Compounds**:
- **Option 1**: If this compound is a primary amine, it will give isocyanide.
- **Option 2**: If this compound is a secondary or tertiary amine, it will not give isocyanide.
- **Option 3**: If this compound is a primary amine, it will give isocyanide.
- **Option 4**: If this compound is a secondary or tertiary amine, it will not give isocyanide.

5. **Conclusion**: Based on the analysis, the compounds that will yield isocyanides upon reaction with CHCl₃ and KOH are:
- **Option 1**: Primary amine → will give isocyanide.
- **Option 3**: Primary amine → will give isocyanide.

### Final Answer:
The compounds that will give isocyanide on reaction with CHCl₃ + KOH are **Option 1 and Option 3**.