The correct answer is option 2: 1, 2 and 3 - Socialist, Secular, and Integrity were added to the Preamble of the Constitution of India by the Constitutional Amendment in 1976.

1. Socialist: This term reflects the commitment of the Indian state to achieving social and economic equality. It promotes the idea that wealth and resources should be distributed fairly among all citizens.

2. Secular: This term signifies that India is a country where the state does not favor any particular religion and treats all religions equally. It upholds the principle of religious freedom and encourages tolerance and harmony among different religious communities.

3. Integrity: This term emphasizes the importance of maintaining the unity and territorial integrity of India. It signifies the commitment to national integration and the protection of India`s sovereignty.

It is important to note that Fraternity, which is the fourth option, was already a part of the original Preamble and was not added by the Constitutional Amendment in 1976.

Therefore, the correct answer is option 2: 1, 2 and 3.