*Most Important MCQs* 👉 What is the headworks on the Sutlej River.. Sulemanki Headworks 👉 Sukkur is the oldest Barrage. 👉 Hanna lake is located in Quetta 👉 First Census was held in Pakistan in 1951 👉 First census held in the Subcontinent in 1881 👉 First census was made in the period of Lord Mayo in Subcontinent. 👉 The 2nd summit of OIC (Organisation of Islamic Cooperation) held in Pakistan in 1974 👉 OIC changed its name from Organisation of the Islamic Conference to Organisation of Islamic Cooperation in 2011.