Which one among the following is NOT a Union Territory of India?

The correct answer is Option (2) → Sikkim

Sikkim is a state: it became the 22nd state of India on 16 May 1975, under the 36th Amendment. Jammu and Kashmir and Ladakh have been Union Territories since 31 October 2019, under the Jammu and Kashmir Reorganisation Act, 2019, and Lakshadweep is a Union Territory in the Arabian Sea.