Select the correct answer from the following codes
A.Only 3
B.Only 1 and 2
C.Only 2 and 3
D.1,2 and 3
Answer:A
Select the correct answer from the following codes
A.Only 3 B.Only 1 and 2 C.Only 2 and 3 D.1,2 and 3
Explanation: It is extremely slow. Chemicals present in air and water set up chemical reactions in surface layers of exposed rocks.