a group of individuals living in a perticular region at perticular time is called

1. local population
2. deme
3. community
4. both (1) & (2)

The correct option is 4.
a deme is a term for a local population of organisms of one species that actively interbreed with one another and share a distinct gene pool. When demes are isolated for a very long time they can become distinct subspecies or species. The term deme is mainly used in evolutionary biology and is often used as a synonym for population.