Explanation:

- Statement 1: "Mr. Prasad said his appeal"

- This part is correctly phrased and introduces the subject and action.

- Statement 2: "was made not as a Minister"

- This part clarifies the capacity in which Mr. Prasad is making his appeal. It is correctly structured.

- Statement 3: "but as a common citizen and a lawyer."

- This part offers the roles Mr. Prasad identifies with for his appeal. It is grammatically correct and complements Statement 2.

- Option 1, a: Incorrect because Statement 1 is error-free.

- Option 2, b: Incorrect because Statement 2 is error-free.

- Option 3, c: Incorrect because Statement 3 is error-free.

- Option 4, d: Correct option because there are no errors in any of the statements.

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