Theory:

Feature
National Party
Regional / State Party
Extent
National parties are political parties which
participate in different elections all over India.
Regional parties are political parties
which participate in different elections
but only within one state.
States
It should be strong enough in at least four states.
It should be strong enough in at least
one or two states.
Symbol
It has an exclusive symbol throughout the
country.
A symbol is reserved for it in the state
in which it is recognised. But the same
symbol can be allotted to different
parties in different states
Goal
It resolves State, National and International
issues.
It promotes regional and state interest.