The TableHeaderColumn's attribute editable with select options is not working

Hi

I have incorporated the boot strap table in my code and I need to make one of the columns as a drop down with an editable option .

The drop down doesn't appear for me when I include the above in the TableHeader.
I am here with attaching my code where I referred your example : Please provide your inputs ,Your help is much appreciated.

Field 1
Field 2
Field3
Fields 1 and 2 also have table header tags but do not appear here , But yes the drop down option for field 3 isn't working in my code

Can you please help me resolve this ?