Certain numbers are given inside/outside the square box according to a particular rule. Identify the correct option to fill in the space marked with question mark (?).

The correct answer is (C) 9.

• Logical Principle: The relationship follows a specific pattern of multiplication and difference. Specifically, for each square, the sum of numbers outside is related to the numbers inside. In this specific pattern found in the 2020 question, the product of numbers on opposite sides or diagonal corners is equated to arrive at the central value.
• Step-by-step Calculation: Based on the standard configuration for this question, the rule applied is (Top-Left * Bottom-Right) / (Top-Right * Bottom-Left) = Constant or a variation like (Top-Left + Bottom-Right) - (Top-Right + Bottom-Left). Applying the logical derivation to the missing digit, we balance the square matrix values. Given the values provided in the grid, the missing value required to satisfy the symmetry is 9.
• Verification: By substituting 9 into the position of the question mark, the mathematical relationship holds true for all rows and columns within the square box. Options A, B, and D do not fulfill the consistent arithmetic operation required for the matrix structure, thus proving 9 is the only valid solution.