Step 1: Understanding One-Point Perspective.
In one-point perspective, all parallel lines converge at a single point. By analyzing the given objects in the perspective, we observe that option (b) B does not align with the other objects, making it the incorrect one.
Step 2: Conclusion.
Thus, the object that does not fit in the one-point perspective is option (b) B.
\[
\boxed{\text{The correct answer is (b) B.}}
\]