Four options have been given out of which three are alike in some manner, while one is different. Choose the odd one.

Let's calculate the absolute difference between the two numbers in each option:
Option A: ∣51−24∣=27

Option B: ∣32−41∣=9

Option C: ∣36−59∣=23

Option D: ∣61−34∣=27

We see that differences don't show a 3-to-1 uniformity except that A and D give 27. Let's look at another pattern: the sum of the digits.

Option A: 51−24→(5+1)=6 and (2+4)=6. Both digit sums are equal (6=6).

Option B: 32−41→(3+2)=5 and (4+1)=5. Both digit sums are equal (5=5).

Option D: 61−34→(6+1)=7 and (3+4)=7. Both digit sums are equal (7=7).

Option C: 36−59→(3+6)=9 and (5+9)=14. The digit sums are not equal (9

=14).

Hence, Option C is the odd one out.