The theory of consolidation predicts settlement due to primary consolidation; it cannot include settlement due to initial compression nor due to secondary consolidation. This happens because of the following assumptions made in developing the theory:1) Soil grains and water are in-compressible2) Soil is fully saturated3) Compression takes place in the vertical direction only4) Time lag in consolidation is entirely due to low permeability soilWhich of the above statements are correct?

• A. 1, 2 and 3 only
• B. 1, 2 and 4 only
• C. 3 and 4 only
• D. 1, 2, 3 and 4