The distinguishing features of a federal government is:
(i) National government gives some powers to the provincial governments.
(ii) Power is distributed among the legislature, executive and judiciary.
(iii) Elected officials exercise supreme power in the government.
(iv) Governmental power is divided between different levels of government.
We know that, federal government is that form of government in which the government if formed of three branches legislative, executive and judiciary and hence the governmental power is divided between these different levels of government.
Therefore option (iv) is correct