Step 1: Analyzing the given pattern.
The pattern S is formed by overlapping three patterns, P, Q, and R. By analyzing the image of S, we can determine how P and R contribute to the overall structure and identify the missing pattern Q.
Step 2: Identifying the missing pattern.
Looking at the arrangement and the differences between the patterns, option (B) fits the missing part of the image, completing the overlapping pattern correctly.
\[
\boxed{(B)}
\]