Which is the most abundant element by mass in the Earth's crust?

Practice MCQ for SSC, UPSC, RRB Exams

A. Oxygen A.
B. Silicon B.
C. Iron C.
D. Aluminium D.

Correct Answer: A সঠিক উত্তর: A

Explanation ব্যাখ্যা

Oxygen makes up about 46% of the Earth's crust by mass, making it the most abundant element in the crust.

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