Find the missing character from the given options.

The correct answer is Option (1) → 1

The eight numbers sit at the two ends of four lines through the centre, so they form four pairs of opposite numbers. In each complete pair, one number is the square of the other:

• 5 (top) and 25 (bottom): \(5^{2}=25\)

• 8 (right) and 64 (left): \(8^{2}=64\)

• 2 (lower right) and 4 (upper left): \(2^{2}=4\)

• 1 (upper right) and ? (lower left): \(1^{2}=1\), so the missing number is 1