Upper limit of any class is different from the lower limit of the next class.

Explanation:
- In statistics, a class interval is a range of values that is used to group data. Class intervals are usually written in the form of [lower limit, upper limit), where the lower limit is included in the interval but the upper limit is not.
- When we have a set of data, we need to organize it into classes or intervals so that we can analyze it more easily. Each class or interval should be mutually exclusive and collectively exhaustive, meaning that each data point should belong to only one class and all data points should be represented in the classes.
- The upper limit of a class is the highest value in that class, while the lower limit of the next class is the lowest value in the next class.
- To ensure that each data point belongs to only one class, we need to make sure that there is no overlap between classes. Therefore, the upper limit of any class cannot be the same as the lower limit of the next class.
- For example, if we have a set of data ranging from 0 to 100 and we want to divide it into classes of width 10, our classes could be [0, 10), [10, 20), [20, 30), and so on. The upper limit of the first class is 10, and the lower limit of the next class is also 10, but not included in the first class.
- Therefore, the answer to this question is B) Different.

Different