The plaintiff is entitled to get the benefit of Section 14 of the Limitation Act, 1963 provided:

Section 14(1) of the Limitation Act, 1963 excludes the time spent prosecuting an earlier civil proceeding only where it was prosecuted with due diligence and in good faith in a court which, from defect of jurisdiction or other cause of a like nature, was unable to entertain it.

Both conditions must be met, so the answer is the option requiring both the former court's inability to entertain the suit for want of jurisdiction and the plaintiff's due diligence and good faith. Either condition alone is not enough.