Arrange the following major elements present in the Earth's crust, in ascending order, in weight percentage: 1. Aluminium 2. Calcium 3. Silicon 4. Oxygen Select the answer using the code given below:

  1. A. 3, 4, 1, 2
  2. B. 4, 3, 1, 2
  3. C. 2, 1, 3, 4
  4. D. 1, 2, 3, 4

Correct Answer: C. 2, 1, 3, 4

Explanation

By weight percentage in the Earth's crust: Calcium (~3.6%), Aluminium (~8.1%), Silicon (~27.7%), and Oxygen (~46.6%). The correct ascending order is 2, 1, 3, 4.

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