The correct answer is C. 3241
In this question, you need to find the single missing operator that changes the order of the symbols from the top row (input) to the bottom row (output).
The most efficient strategy is the first-digit elimination method:
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Look at the first symbol of the bottom row: It is the Blue Star.
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Find its original position: In the top row, the Blue Star is in the 3rd position.
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Determine the first digit: Because the 3rd symbol moved to the 1st position, the first digit of the correct operator must be 3.
By looking at the answer choices, you can immediately eliminate 4132 and 1342 because they do not start with 3. This leaves 3142 as the only logical choice.
To double-check 3142, verify the remaining digits:
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1 (2nd digit): The 1st symbol from the top row moves to the 2nd position of the bottom row.
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4 (3rd digit): The 4th symbol from the top row (Yellow Hexagon) moves to the 3rd position of the bottom row.
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2 (4th digit): The 2nd symbol from the top row moves to the 4th position of the bottom row.
All positions match perfectly, confirming 3142 is the correct answer.