The correct set of the products obtained in the following reactions :
` (A ) RCN overset ( "reduction ") to (B ) RCN underset( (ii ) H_2 O) overset( ( i) CH_3 Mg Br ) `
` (c ) RNC overset( " hydrolysis ") to (D ) RNH _2 overset( HNO_2 ) to `
the correct answer is :

Options

A. `2^@ ` Amine Methylketone `1^@ ` Amine Alcohol
B. `1^@ ` Amine Methylketone `1^@ ` Amine Alcohol
C. `2^@ ` Amine Methylketone `2^@ ` Amine Acid
D. `1^@ ` Amine Methylketone `1^@ ` Amine Aldehyde

Answer

To solve the question, we will analyze each reaction step by step and identify the products formed.

### Step 1: Reduction of RCN
- **Reaction**: RCN (a nitrile) undergoes reduction.
- **Product**: The reduction of a nitrile (RCN) typically yields a primary amine (RNH2).
- **Explanation**: The carbon-nitrogen triple bond in the nitrile is reduced to a carbon-nitrogen single bond, resulting in a primary amine.

### Step 2: Reaction of RCN with CH3MgBr and H2O
- **Reaction**: RCN reacts with CH3MgBr (a Grignard reagent) followed by hydrolysis with water.
- **Product**: The product of this reaction is a methyl ketone (R-C(=O)-CH3).
- **Explanation**: The Grignard reagent adds to the carbon of the nitrile, forming an intermediate that upon hydrolysis produces a ketone.

### Step 3: Hydrolysis of RNC
- **Reaction**: RNC (isocyanide) undergoes hydrolysis.
- **Product**: Hydrolysis of isocyanide (RNC) yields a primary amine (RNH2).
- **Explanation**: The hydrolysis of isocyanides results in the formation of primary amines.

### Step 4: Reaction of RNH2 with HNO2
- **Reaction**: RNH2 (a primary amine) reacts with HNO2 (nitrous acid).
- **Product**: The product of this reaction is an alcohol (R-OH).
- **Explanation**: The reaction of a primary amine with nitrous acid results in the formation of an alcohol through the formation of a diazonium salt that decomposes to give the alcohol.

### Summary of Products
1. From RCN (reduction) → Primary amine (RNH2)
2. From RCN with CH3MgBr and H2O → Methyl ketone (R-C(=O)-CH3)
3. From RNC (hydrolysis) → Primary amine (RNH2)
4. From RNH2 with HNO2 → Alcohol (R-OH)

### Final Answer
The correct set of products obtained in the reactions is:
- Primary amine
- Methyl ketone
- Primary amine
- Alcohol

The correct answer is the second option.

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