Problem Solving

Please refer the qs below -

9. If the above fig is true, where a, b, and c are each equal to 0 or 1, then x could be each of the following EXCEPT
(A) 1/16
(B) 3/16
(C) 5/16
(D) 10/16
(E) 11/16

And OA is C

But I solved the qs in following way -
if a,b and c = 1, x = 11/16 now the numerator will always be odd as a, b and c can be either 0 or 1. Getting me what I want to explain? Pls guys help me to point out my fault here.