A) Al
B) Fe
C) Na
D) Ca
Correct Answer: A
Solution :
The most abundant metal in earth's crust is Al. While oxygen is the most abundant element in the earth's crust > the order of abundant of elements in earth's crust is as follows: \[\text{O}>Si>Al>Fe>Ca>Na\] Hence, the correct option is [a].You need to login to perform this action.
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