Which of the following state is not created from the state of Assam?

Sikkim

The correct answer is option 2- Sikkim

Out of the given options, the state not created from the state of Assam is Sikkim.

While Nagaland, Mizoram, and Arunachal Pradesh were indeed carved out of Assam at different points in time, Sikkim has a distinct historical background and was never part of Assam. It was a kingdom and then a protectorate of India before becoming a full-fledged state in 1975.

Nagaland: Became a state in 1963 after being part of Assam.
Mizoram: Became a state in 1986 after being a Union Territory, previously part of Assam.
Arunachal Pradesh: Became a state in 1986 after being a Union Territory, previously part of Assam.
Sikkim: Never part of Assam, became a state in 1975.