Which one of the following best defines the term 'State'?
(a)
A community of persons permanently occupying a definite territory independent of external control and possessing an organized government
(b)
A politically organized people of a definite territory and possessing an authority to govern them, maintain law and order, protect their natural rights and safeguard their means of sustenance
(c)
A number of persons who have been living in a definite territory for a very long time with their own culture, tradition and government
(d)
A society permanently living in a definite territory with a central authority, an executive responsible to the central authority and an independent judiciary