(b) Coefficient of static friction is always greater than the coefficient of kinetic friction.

(c) Limiting friction is always greater than the kinetic friction.

(d) Limiting friction is never less than static friction.

Explanation:  

Static friction is not constant. It varies from zero to maximum value of Limiting friction depending upon the force applied on the body to move it while kinetic friction is a bit less than the Limiting friction. So static friction may or may not be greater than the kinetic friction. So option (a) is not correct.              

Coefficient of static friction is equal to Limiting friction force divided by Normal force while coefficient of Kinetic friction is equal to force applied to just move the body with a uniform velocity divided by the Normal force. Since Limiting friction force is always greater than the force applied to just move the body with uniform velocity, hence Coefficient of static friction is always greater than the coefficient of kinetic friction. So options (b), (c)  and  (d) are correct.