Rearrange: √(?) = 8616.89 - 8575.35 = 41.54. Therefore, ? = 41.54² ≈ 1726. None of the options exactly match this. Option B (1681 = 41²) is closest mathematically, but Option A (1765) is marked correct, which suggests either a calculation error in the question or different interpretation. Based on the square of 41.54, 1726 is closest to 1765 among available options.