A jar contains only three types of objects: red,blue, and silver paper ... ...

A jar contains only three types of objects: red, blue, and silver paper clips.  The probability of selecting a red paper clip is 1/4, and the probability of selecting a blue paper clip is 1/6.  What is the probability of selecting a silver paper clip?
(A)   5/12
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Set V - Probability & Statistics