The Constitutional Amendment passed during emergency.

42nd Amendment

The correct answer is Option (3) - 42nd Amendment

The 42nd Amendment Act was enacted in 1976 during the emergency. Among the various changes made by the 42nd amendment, one was that the duration of the legislatures in the country was extended from five to six years. This change was not only for the Emergency period but was intended to be of a permanent nature. This amendment is also called "Mini Constitution Of India".