Which one of the following element is found in most abundance in the earth’s crust? A. Oxygen B. Aluminum C. Silicon D. Iron View AnswerA. Oxygen Related Posts: Biology Class 9 Chapter 9 MCQs With 4 TestsBiology Class 9 Chapter 8 MCQs With 4 TestsComputer Science class 9 Chapter 1 MCQs with 3 TestsComputer Science Class 9 Chapter 2 MCQs With 3 TestsBiology Class 9 Chapter 7 MCQs With 3 Tests
