Nations and peoples without an official state government are called
a. sovereign states
independent states
stateless nations
territories

stateless nations

Explanation:

A stateless nation is an ethnic group or nation that doesn't possess a state. Members of the stateless nation are residents of the nations in which they live and are not recognized by the united nations. They are displaced across a number of states and have a large population base. These people have common origins, culture and common customs that are turned in to the nation by the citizen status as they being completely independent of the other.   Thus is not a sovereign state and not a subgroup of nations examples include the Kurds, Igbo people, Zulu Assamese, Baloch, shan people, and many more ethnic peoples.

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