Dropdown not populating data as showing in table

[BindhyaKC]

On click edit button in the first attempt the option item is correctly selected in dropdown. Then I changed dropdown value. But if I leave it without saving into the database the table shows the original old data. But if I click again on the edit button, the item selected last time is showing selected, not the original data as showing in table. I am having issues with this since I am modifying other td values according to the dropdown values. How can I rectify this?