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Hi Taylor thanks for the code and
For the drop downs i need 4 dropdowns in that 3 drop down must be menu and the the 4dropdown list must contain checkboxes with multiple select. For Eg; i had the vehicles dropdown in that the menu should contain cars,bikes,bus,lorry. i have car and bike so that i can select car and bike checkbox
Radio buttons are used in forms, they are a type of input element. See https://www.w3schools.com/html/html_form_input_types.asp I'm uncertain whether you mean drop down menus or drop down selection lists for "drop downs". As a form element see https://www.w3schools.com/html/html_form_elements.asp
If you want a drop down selection list in a form use the <select> element and apply the 'multiple' attribute to allow multile selections, see previous link on html form elements for an example. You seem to be confusing your visual metaphors, or the terminology. Don't confuse form cntrols with navigation controls. When we talk about menus we normally mean navigaton menus on a web page, these may or may not be drop down menus. These menus are usually html lists that are heavily styled using CSS. See https://www.w3schools.com/css/css_dropdowns.asp for more information on CSS dropdowns. Item selection boxes in forms are a different entity altogether.