Which one of the following statements is. $\textbf{NOT}$ correct?

1. A clay deposit with a liquidity index greater than unity is in a state of plastic consistency.
2. The cohesion of normally consolidated clay is zero when triaxial test is conducted under consolidated undrained condition.
3. The ultimate bearing capacity of a strip foundation supported on the surface of sandy soil increases in direct proportion to the width of footing.
4. In case of a point load, Boussinesq’s equation predicts higher value of vertical stress at a point directly beneath the load as compared to Westergaards’s equation.