5. If the direction of flow of water is parallel to the planes of stratification, then the permeability is
A. 2 to 30
B. 2 to 20
C. 2 to 10
D. 2 to 15
5. If the direction of flow of water is parallel to the planes of stratification, then the permeability is
A. 2 to 30
B. 2 to 20
C. 2 to 10
D. 2 to 15