Which of the following is the correct order for elements/minerals found in the earth crust?

Answer: [D] Oxygen>Silicon>Aluminium>Iron

Major elements in Earth’s crust are Oxygen (47%), Silicon (28%), Aluminium (8%), Iron (5%), Calcium (3.5%), Sodium (2.5%), Potassium (2.5%) & Magnesium (2.2%) 

This question is a part of GKToday's Integrated IAS General Studies Module