How to create dynamic Dropdowns in Custom Input HTML form?

Hi All,
Can anyone help me to create dynamic dropdowns in HTML. the required dropdown elements will be available in a Data table.
So , How to show those elements in datatable in HTML form dropdown list?

Let me know if any one can help me out .
Thanks Are you able to Create an HTML form? Are you using Create Form Activity to Create Form?

I am not using form activity. Its a custom HTML form :smiley:
Thnks for reply:)