PMS 2019 Past Paper MCQs, General Knowledge MCQs, PPSC Solved Past Papers MCQsTaj Mahal was built by Shah Jahan to immortalize his wife Mumtaz Mahal. Its construction spanned 22 years. When was the project commenced?A. 1622 B. 1632 C. 1642 D. 1652 Jinnah Pakistan and Islamic Identity. Who wrote this book?How many layers does Earth’s atmosphere have?