Consider the following statements:
(i) Quicksand is a special variety of sand
(ii) Quicksand is not a material but a hydraulic condition.
(iii) In nature, quicksand condition is observed usually in coarse silt or fine sand.
Which of the above statements are correct?
1. (i), (ii) and (iii)
2. (i) and (ii)
3. (ii) and (iii)
4. (i) and (iii)