What does Article 5 refer to in relation to the rights of citizenship of certain migrants to Pakistan?
The context given does not mention Article 5 directly. However, it can be inferred that Article 5 refers to the rights of citizenship for certain persons who have migrated to Pakistan after the first day of March, 1947. This is based on the reference to "Articles 5 and 6" in the context provided where the discussion is about the criteria for a person to be considered as a citizen of India under Article 6.