Correct option is D
- The 42nd Amendment Act (1976) added the words "Secular" and "Socialist" to the Preamble, reflecting India's commitment to religious equality and social welfare.
- This amendment emphasized the separation of religion from state affairs.
Additional Information:
- The amendment was passed during the Emergency period under Prime Minister Indira Gandhi.
- It is considered one of the most extensive amendments to the Indian Constitution.
Other Options:
- 43rd Amendment Act: Reversed some provisions of the 42nd Amendment but did not affect the Preamble.
- 44th Amendment Act: Focused on curbing executive powers and restoring Fundamental Rights but did not amend the Preamble.
- 41st Amendment Act: Related to the retirement age of state public service commission members.