According to the fundamental duties given in the Indian Constitution, it shall be the duty of every citizen of India to uphold and protect the sovereignty, _____ of India.

unity and integrity

The correct answer is Option 2 - unity and integrity

According to the fundamental duties given in the Indian Constitution, it shall be the duty of every citizen of India to uphold and protect the sovereignty, unity, and integrity of India.

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.