<Li> North Button Island </Li> <Li> Middle Button Island </Li> <Li> South Button Island </Li> <Ul> <Li> <Ul> <Li> East Volcano Islands <Ul> <Li> Barren Island </Li> <Li> Narcondam Island </Li> </Ul> </Li> </Ul> </Li> </Ul>

Which group of islands is located in arabian sea