Correct option is B
Given: 115, 94, 72, 49, 25, ?
Difference-
115 - 94 = 21
94 - 72 = 22
72 - 49 = 23
49 - 25 = 24
From the above, we can see that the differences between consecutive terms are increasing by 1.
So, the next difference should be 25.
Now, subtract 25 from the last number in the series:
25 - 25 = 0
Thus, the missing number is 0.
The correct answer is (b) 0.