Consider the following sources of world water supply and arrange them in descending order.
1. Oceans
2. Rivers
3. Polar ice and Glaciers
4. Ground water
Select the correct answer from the code given below:

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