Explanation:

- Let's analyze the given series: 100, 91, 81, 70, 60, 45.

- The pattern in the series appears to be decreasing numbers.

- Look at the difference between each number:

- 100 - 91 = 9

- 91 - 81 = 10

- 81 - 70 = 11

- 70 - 60 = 10

- 60 - 45 = 15

- The differences must follow a regular pattern to form a proper series.

- Here, there is an inconsistency after 70. The difference between 70 and 60 is not increasing as expected.

- Correct pattern should have decreasing amounts in an arithmetic sequence.

The wrong term in this series is Option 3, 60 .