Which picture is different from the other pictures in the figure given below?

Pattern Analysis
Numerical Pattern: Pictures 1, 2, and 3 correspond to odd numbers (1 and 3 are explicitly labeled, and 2 is implied as the third position in the sequence, though the solution notes 1, 3, and an implied odd number).

Distinct Outlier: Picture 4 displays the number 4 (which is even). Because the other options share the common property of being associated with odd numbers or follow a sequence where 4 breaks the pattern, it stands out as the outlier.