Which of the following is not a ’state’?

The correct option is Laddakh.

In the context of the political structure of India, the territories are categorized into States and Union Territories:
1. Nagaland, Manipur, and Meghalaya are fully recognized states of India, each having its own elected state government.
2. Ladakh (also spelled Laddakh) was historically a part of the state of Jammu and Kashmir. However, under the Jammu and Kashmir Reorganisation Act passed in 2019, the region was separated and reconstituted as a Union Territory of India, rather than a state. The Union Territory of Ladakh is directly administered by the Central Government of India through a Lieutenant Governor.

Therefore, Ladakh is not a state.