PPSC Solved Past Papers MCQs, Geography MCQs, PMS GK 2020 Solved Paper MCQsAccording to science, the Earth is ______ years old ?A. 10 billion B. 4.5 million C. 4.5 billion D. 450 million Cirrhosis is a disease that affects which organ among the following?_________ makes up 14 to 17 percent of skeleton.
