In which year CENTO was established.

1955

*The correct answer is option (3) - 1955*

CENTO (Central Treaty Organization), also known as the Baghdad Pact, became inactive in 1979. It was a military alliance formed in 1955, which included the United Kingdom, Iran, Iraq, Pakistan, and Turkey. However, CENTO's effectiveness had diminished over the years, and it formally disbanded in 1979.