<Li> Central Semitic <Ul> <Li> Northwest Semitic </Li> <Li> Arabic </Li> </Ul> </Li> <Ul> <Li> Northwest Semitic </Li> <Li> Arabic </Li> </Ul> <Li> South Semitic <Ul> <Li> Western: Ethiopian Semitic and Old South Arabian </Li> <Li> Eastern: Modern South Arabian </Li> </Ul> </Li> <Ul> <Li> Western: Ethiopian Semitic and Old South Arabian </Li> <Li> Eastern: Modern South Arabian </Li> </Ul>

Which of these languages is most closely related to arabic