Consider the following statements :1. The standard penetration test is a reliable method for measuring the relative density of granular soils.2. For a sand having the same relative density, N-values remain the same at all depths.3. For a sand having the same relative density, N-values are different at different depths.Which of the statements given above is/are correct ?

Consider the following statements :1. The standard penetration test is

1.	Consider the following statements :1. The standard penetration test is a reliable method for measuring the relative density of granular soils.2. For a sand having the same relative density, N-values remain the same at all depths.3. For a sand having the same relative density, N-values are different at different depths.Which of the statements given above is/are correct ?
A.	1, 2 and 3
B.	1 and 2
C.	only 3
D.	1 and 3
Answer» E.

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