If ko is the coefficient of earth pressure at rest, ka is the coefficient of active earth pressure, kp is the coefficient of passive earth pressure and ? is Poisson's ratio, then the value of (1 - ?/? is given by

If ko is the coefficient of earth pressure at rest, ka is the coeffici

1.	If ko is the coefficient of earth pressure at rest, ka is the coefficient of active earth pressure, kp is the coefficient of passive earth pressure and ? is Poisson's ratio, then the value of (1 - ?/? is given by
A.	ka / kp
B.	ko / ka
C.	kp / ko
D.	1 / ko
Answer» E.