Match the items of the two lists and select the correct answer.
List I (Boring Methods)
P. Auger Boring
Q. Wash Boring
R. Percussion Drilling
S. Rotary Drilling
List II(Field Conditions)
1. Below water table in all soil types except hard soils and rocks
2. Large diameter boreholes over 150 mm in size.
3. Explorations for shallow foundations and highways.
4. Boulder and gravelly strata