here is the image I want to add a bootstrap caret class in my select dropdown menu.
border: thin #ddd solid;
<select class="form-control select_menu" style="">
<option>Click here to select purpose</option>
<option>Options 2 </option>
Check out this answer - I think it will be right about what you're looking for.
The caret displayed in a
<select> element is determined by the user's browser or OS. You can override this to set a custom caret/image; however, as described in the linked post, you risk diminishing the quality of experience on mobile devices.
Proceed with caution, good luck!