Correct answer: Secular
The 42nd Constitutional Amendment Act was passed in 1976, during the Emergency period under Prime Minister Indira Gandhi.
This amendment changed the wording of the Preamble. It added three new words to the original text.
The words added were Socialist, Secular, and Integrity.
Before this amendment, India was described only as a Sovereign Democratic Republic.
After the amendment, the Preamble reads Sovereign Socialist Secular Democratic Republic.
The word Secular confirms that the state treats all religions equally and has no official religion.
The word Socialist reflects the goal of reducing inequality and promoting social welfare.
The word Integrity was added along with Unity in the phrase Unity and Integrity of the Nation.