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:

CDS 2025 PYQ with Answer — Arrange the following major elements present in the Earth’s crust, in…

2025 · Q54

Arrange the following major elements present in the Earth’s crust, in ascending order, in weight percentage:

1Aluminium
2Calcium
3Silicon
4Oxygen Select the answer using the code given below:

General KnowledgeGeography

A3, 4, 1, 2
B4, 3, 1, 2
C2, 1, 3, 4
D1, 2, 3, 4

Explanation

By weight, the Earth's crust (Clarke numbers) is about 46.6% oxygen, 27.7% silicon, 8.1% aluminium and 3.6% calcium. In ascending order of weight percentage this is calcium (2), aluminium (1), silicon (3), oxygen (4). Oxygen and silicon together account for nearly three-quarters of the crust's weight.