Which of the following represents the correct geological cycle for the formation of soil?

A dense sand at very low confining stress in a drained triaxial test is likely to show:

Which of the following methods is/are used to determine the in-situ density of soil? I. Sand replacement method II. Core cutter method

In the context of the soil classification system, what is the A-line equation in Casagrande's plasticity chart? (where Ip = plasticity index, wL = liquid limit)