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Consider the following statements made aboout sedimentary rocks?

1. Sedimentary rocks are formed at earth surface by the hydrological system

2. Formation of sedimentary rocks involves ac weathering of pre-existing rocks

3.  Sedimentary rocks contain fossils

4. Sedimentary rocks typically occur in layers

Which of these statements are correct?

A) 1 and 2            

B) 1 and 4

C) 2, 3 and 4                     

D) 1, 2, 3 and 4