Which of te following reaction gives correct major product-

Options

A.
B.
C.
D.

Explanation

To determine which of the given reactions yields the correct major product, we will analyze each reaction step by step.

### Step 1: Analyze Reaction A
- **Reaction**: Toluene (C6H5CH3) is treated with Cl2 in the presence of Hν (light).
- **Mechanism**: The chlorine radical (Cl•) will attack the benzylic position (the carbon next to the benzene ring) of toluene, leading to the formation of benzyl chloride (C6H5CH2Cl).
- **Product Formation**: The product formed is C6H5CH2Cl.

### Step 2: Analyze Reaction B
- **Reaction**: Benzene (C6H6) is treated with an alkene in the presence of H2SO4.
- **Mechanism**: H2SO4 protonates the alkene, forming a carbocation. The most stable carbocation will be formed, which is then attacked by the benzene ring.
- **Product Formation**: The product will be a substituted benzene derivative, but it does not match the expected major product.

### Step 3: Analyze Reaction C
- **Reaction**: Benzene is treated with an alkyl halide in the presence of AlCl3.
- **Mechanism**: The alkyl halide forms a carbocation in the presence of AlCl3. If the carbocation rearranges to a more stable form, it will then react with benzene.
- **Product Formation**: The product formed is a substituted benzene derivative, but it does not match the expected major product.

### Step 4: Analyze Reaction D
- **Reaction**: Benzene is treated with a cyclic anhydride in the presence of anhydrous AlCl3.
- **Mechanism**: The cyclic anhydride reacts to form a carbocation, which then attacks the benzene ring.
- **Product Formation**: The major product formed is a substituted aromatic compound, which matches the expected major product.

### Conclusion
After analyzing all four reactions, we find that the correct major product is obtained from Reaction D.

### Final Answer
The correct answer for the question is **D**.

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