Correct option is C
1 → +4 → 5 5 → +9 → 14 14 → +16 → 30 Next difference: +25 30 + 25 = 55 Explanation of options: (a) ✘ 49 would be +19, not in square pattern (b) ✘ 50 is random, not a square pattern (c) ✔ 55 fits the pattern of adding perfect squares (d) ✘ 57 is just +27, which doesn’t follow the logic