Odd One Out: 51, 65, 80, 93, 107

To find the odd one out among the given numbers, we need to analyze the pattern or sequence in which the numbers are arranged.

Analyzing the Sequence:
- The given sequence of numbers does not follow a simple arithmetic progression or a geometric progression.
- However, we can observe that the numbers are increasing in a somewhat irregular pattern.

Identifying the Odd One Out:
To identify the odd one out, we can look for a pattern or rule that is followed by most of the numbers but not by one of them.

- 51: No specific pattern observed.
- 65: If we subtract 51 from 65, we get 14.
- 80: If we subtract 65 from 80, we get 15.
- 93: If we subtract 80 from 93, we get 13.
- 107: If we subtract 93 from 107, we get 14.

Analysis:
- From the calculations above, we can see that there is a consistent change of 14 or 15 between most of the consecutive numbers.
- However, the number 80 breaks this pattern by having a difference of 15 instead of 14.
- This deviation from the pattern makes 80 the odd one out among the given numbers.

Therefore, the correct answer is option 'B) 80' as it does not follow the same pattern as the other numbers in the sequence.