Which of the following are examples of chemical weathering? Choose the correct answer from the options given below:

1.Movement of rock along a fracture.

2.Rusting of iron.

3.Breaking of feldspar to clay.

4.Acid action.

A1 and 2 only

B2 and 3 only

C1, 2 and 3 only

D2, 3 and 4 only

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