Find the missing number?

Answer: Option D

Logic (Left to Right):

44 = 12 * 12 = 144 (Remove First Digit) = 144
69 = 13 * 13 = 169 (Remove First Digit) = 69
96 = 14 * 14 = 196 = 96
25 = 15 * 15 = 225 = 25
56 = 16 * 16 = 256 = 56

Similarly,
Missing Number = 17 * 17 = 289 ( Remove first digit) = 89.