The correct option is A 39
We know that successor of a number is one added to the number, and predecessor of a number is one subtracted from the number.
=> Successor of 974 is 974 + 1 = 975
and Predecessor of 26 is 26 - 1 = 25
Now, we can divide 975 by 25:
975 ÷ 25 = 39
Thus, option 'd' is the required answer.