Step 1: Analyze the given sequence of problem figures.
The problem figures consist of a series of shapes and letters. Let us break down the components of each figure:
The first figure contains \( 1 \) and \( s \) followed by a box.
The second figure contains \( S \) followed by a triangle.
The third figure contains \( \Delta \) followed by a square.
The fourth figure contains \( \square \) followed by a letter \( L \).
The fifth figure contains a letter and a triangle, followed by the same square shape.
Step 2: Identify the pattern.
We observe a change in both the geometric shapes and the accompanying letters. The shapes seem to alternate, and the letters follow a sequence:
The first letter changes between \( 1, S, \Delta, \square \), and so on.
The second letter follows a similar alternating pattern of geometric shapes.
Step 3: Predicting the next figure.
Looking at the figures and their arrangement:
The sequence alternates between a letter and a geometric shape.
The answer that fits logically in the sequence is option 4. The shapes and letters align according to the alternating pattern, and it continues the progression observed.
Step 4: Conclusion.
The correct answer is option C: 4.