Correct option is B
In this question following logic is followed-
2nd × 2 + 3rd = 1st Number
34, 12, 10 → 12 × 2 + 10 = 24 + 10 = 34
56, 17, 22 → 17 × 2 + 22 = 34 + 22 = 56
Similarly,
46, 19, 8 → 19 × 2 + 8 = 38 + 8 = 46
Thus, the correct answer is (b).