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 about the products obtained from the given reactions involving amines, we will analyze each reaction step by step.

### Step 1: Reduction of RCN
The first reaction is the reduction of a nitrile (RCN) to a primary amine (RNH2).

**Reaction:**
\[ \text{RCN} \overset{\text{reduction}}{\rightarrow} \text{RCH}_2\text{NH}_2 \]

**Product:**
The product of this reaction is a primary amine, specifically RCH2NH2.

### Step 2: Reaction of RCH2NH2 with HNO2
Next, we have the reaction of the primary amine (RCH2NH2) with nitrous acid (HNO2).

**Reaction:**
\[ \text{RCH}_2\text{NH}_2 + \text{HNO}_2 \rightarrow \text{RCH}_2\text{N}_2^+ + \text{HCl} \]

This reaction produces a diazonium salt (RCH2N2^+) which is unstable and decomposes.

**Decomposition:**
The diazonium salt decomposes to form an alcohol and nitrogen gas.

**Product:**
The final products are RCH2OH (an alcohol) and N2 (gas).

### Step 3: Hydrolysis of RNC
Now we look at the hydrolysis of isocyanide (RNC).

**Reaction:**
\[ \text{RNC} + 2 \text{H}_2\text{O} \rightarrow \text{RNH}_2 + \text{HCOOH} \]

**Product:**
The products of this hydrolysis are a primary amine (RNH2) and formic acid (HCOOH).

### Step 4: Grignard Reaction with RCN
Next, we consider the reaction of RCN with a Grignard reagent (CH3MgBr).

**Reaction:**
\[ \text{RCN} + \text{CH}_3\text{MgBr} \rightarrow \text{R-C}^-(\text{C}H_3)\text{N}^+(\text{MgBr}) \]

After the Grignard reagent attacks the carbon of the nitrile, hydrolysis will convert the intermediate.

**Hydrolysis:**
\[ \text{Intermediate} + \text{H}_2\text{O} \rightarrow \text{RCH}_3\text{C=O} + \text{RNH}_2 \]

**Product:**
The products are a ketone (RCH3C=O) and a primary amine (RNH2).

### Summary of Products
1. From RCN (reduction): RCH2NH2 (primary amine)
2. From RCH2NH2 (with HNO2): RCH2OH (alcohol) + N2 (gas)
3. From RNC (hydrolysis): RNH2 (primary amine) + HCOOH (formic acid)
4. From RCN (with CH3MgBr and hydrolysis): RCH3C=O (ketone) + RNH2 (primary amine)

### Final Answer
The correct set of products obtained from the reactions is:
- Primary amine (RCH2NH2)
- Alcohol (RCH2OH)
- Primary amine (RNH2)
- Ketone (RCH3C=O)