[Ccddfergt]

the prophets blood line as the true leader (Imam Ali) After the prophet's (Pbuh) death.

after the death of prophet the leader of Mumin was Abu bakr(rd), then Umar(rd), then Usman(rd), then Ali(rd).

but inturn if i prove that Imam ali is the right calpih,

He was right, and he followed other right caliph´s before him.

the (shia school of thought)

it didnt exist at the time of prophet neither at time of ali(rd).

If anyone here can prove to me that sunnah is right,

well sunnah means method of prophet , and muslim follows the method of prophet