Question

The symbols ○, ✶, △, and □ are to be filled in a grid. Rules: 1. Every row and every column must contain each of the four symbols.
2. Every 2×2 square (bold lines) must also contain each of the four symbols. Which symbol will occupy the box marked with '?'? \begin{center} \includegraphics[width=0.5\textwidth]{02.jpeg} \end{center}

• A. ○
• B. ✶
• C. △
• D. □

Hint:

In puzzles with grid-filling rules (similar to Sudoku), always check row, column, and box constraints together. The unique missing symbol is the answer.

Answer 1

The Correct Option is D

Step 1: Row 1 Analysis.
Row 1 contains symbols ○ and △. The missing symbols for this row are ✶ and □.

Step 2: Column 1 Analysis.
Column 1 contains ○ (in Row 2) and ✶ (in Row 3). The missing symbols for this column are △ and □.

Step 3: Top-Left 2×2 Block Analysis.
Symbols present in this block: ○, ✶, △. The only symbol not yet present is □.

Step 4: Deduction.
Consequently, the cell marked with '?' should contain: \[\boxed{□}\]