Which is the most abundant metal in the Earth’s crust?

Which is the most abundant metal in the Earth’s crust?
[A]Aluminium
[B]Nickel
[C]Iron
[D]Silicon

Aluminium
Aluminum is the most abundant metal in the Earth’s crust, and the third most abundant element therein, after oxygen and silicon. It makes up about 8% by weight of the Earth’s solid surface. Earth’s crust occupies less than 1% of Earth’s volume. Oxygen is 46.6% , Silicon 27.77%, Aluminum is 8.09% and Iron is 5% . Next comes calcium which is 3.6 % followed by Sodium, Potassium, Magnesium and others.