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Read the following statements:

  1. While designing a shallow footing in sandy soil, monsoon season is considered for critical design in terms of bearing capacity.
  2. For slope stability of an earthen dam, sudden drawdown is never a critical condition.
  3. In a sandy sea beach, quicksand condition can arise only if the critical hydraulic gradient exceeds the existing hydraulic gradient.
  4. The active earth thrust on a rigid retaining wall supporting homogeneous cohesionless backfill will reduce with the lowering of water table in the backfill.

Which one of the following combinations is correct?

  1. $\text{(P)-True, (Q)-False, (R)-False, (S)-False}$
  2. $\text{(P)-False, (Q)-True, (R)-True, (S)-True}$
  3. $\text{(P)-True, (Q)-False, (R)-True, (S)-True}$
  4. $\text{(P)-False, (Q)-True, (R)-False, (S)-False}$
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