In which of the following years was the Preamble of the Indian Constitution first amended?

1976

The correct answer is Option 3 - 1976

The Preamble of the Constitution of India was amended by the 42nd Constitutional Amendment Act of 1976. This amendment is also sometimes referred to as the "Mini-Constitution" due to the extensive changes it introduced.

Changes to the Preamble:
Added Words: Three words were inserted into the Preamble: "Socialist," "Secular," and "Integrity of the Nation." This aimed to reflect India's commitment to those ideals.

The exact text of the Preamble - 

WE, THE PEOPLE OF INDIA having solemnly resolved to constitute India into a SOVEREIGN SOCIALIST SECULAR DEMOCRATIC REPUBLIC and to secure to all its citizens:

JUSTICE, social, economic and political;

LIBERTY of thought, expression, belief, faith and worship;

EQUALITY of status and of opportunity; and to promote among them all

FRATERNITY assuring the dignity of the individual and the unity and integrity of the Nation;

IN OUR CONSTITUENT ASSEMBLY this twenty-sixth day of November, 1949, do HEREBY ADOPT, ENACT AND GIVE TO OURSELVES THIS CONSTITUTION.