Private International Law is often referred to as "Conflict of Laws", because:

It constitutes of conventions, model laws, domestic laws of states and secondary legal sources. It applies only when a dispute arises between two private individuals of two different nations. It involves issues on the jurisdiction to hear the dispute and jurisdication's Law that should be applied. It is based on customary International Law.

It involves issues on the jurisdiction to hear the dispute and jurisdication's Law that should be applied.

The correct answer is Option (3) → It involves issues on the jurisdiction to hear the dispute and jurisdication's Law that should be applied.