Answer:
(d) 22
Explanation:
1 to 4 difference is 3
4 to 10 difference is 6
10 to 22 difference is 12
22 to 46 difference is 24
46 to 94 difference is 48
so, you can see that the difference multiplies by 2 (3x2 = 6, 6x2 = 12, etc.)
thus the answer is d. 22