Under which constitution was Islam formally established as the state religion of Pakistan?

Explanation

Islam was officially recognized as Pakistan's state religion in the 1973 Constitution, which was adopted following the country's first general elections. This constitution declared Pakistan an Islamic Republic and included Article 2, which states Islam as the official religion. It also established institutions such as the Shariat Court and the Council of Islamic Ideology to ensure that laws align with Islamic principles derived from the Quran and Sunnah. Additionally, the constitution prohibited the enactment of laws contrary to Islamic injunctions and formed a council comprising judiciary members and Islamic scholars to oversee religious matters.