I have a category in my object how can I remove duplicates from each category if there is a duplicate existence based on each category in the list concept.
Please see my requirement below.
```
Category Name
------- -------
A 1
A 1
A 2
B 1
B 1
B 3
```
Final Result should be like
```
Category Name
------- -------
A 1
A 2
B 1
B 3
```