Explanation:

- The First Amendment to the Constitution of India was enacted in the year 1951, shortly after the original Constitution came into effect in 1950.

- Option 1: 1952 - This is incorrect. By this time, the First Amendment had already been made.

- Option 2: 1951 - This is the correct answer.

- Option 3: 1953 - Also incorrect. This happens after the First Amendment was already established.

- Option 4: 1950 - Although this was the year the Constitution itself came into effect, the First Amendment had not yet been made.

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