4. A sample of soil has liquid limit 45%, plastic limit 25%, shrinkage limit 17% and natural moisture content 30%. The consistency index of the soil is
A. 13?20
B. 8?20
C. 15?20
D. 5?20
4. A sample of soil has liquid limit 45%, plastic limit 25%, shrinkage limit 17% and natural moisture content 30%. The consistency index of the soil is
A. 13?20
B. 8?20
C. 15?20
D. 5?20