JSFiddle - React, Tailwind, and code Playground

HTML

<select class="form-control square" id="subCategory" name="Category">
</select>

JavaScript

var data = {"1": "Android", "2":"IOS", "3":"Business Management Systems", "4":"Database", "5":"Codes/Scripts", "6":"Others"};
    console.log( data );
    $.each(data, function(key, value) {   
        $('#subCategory').append(
            $('<option/>').val( key ).text( value )
        );
    });