Which of the following is the most abundant metal on Earths crust?

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Q: (SSC/0)

Which of the following is the most abundant metal on Earth’s crust?
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question_subject: 

Geography

question_exam: 

SSC

stats: 

0,34,28,4,17,7,34

keywords: 

{'abundant metal': [1, 0, 0, 0], 'aluminium': [1, 0, 3, 2], 'copper': [1, 0, 1, 1], 'magnesium': [1, 0, 2, 3], 'crust': [1, 1, 0, 0], 'iron': [0, 0, 1, 1], 'earth': [0, 1, 1, 1]}