materialSelect jquery function

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<div class="col-3">
  <select id="Drop1" class="mdb-select md-form colorful-select dropdown-dark mx-2" multiple>
    <option value="" disabled selected>Car Features</option>
  </select>
  <label class="mdb-main-label">Car Features</label>
</div>
​
<div class="col-3">
  <select id="Drop2" class="mdb-select md-form colorful-select dropdown-dark mx-2" multiple>
    <option value="" disabled selected>Bike Features</option>
  </select>
  <label class="mdb-main-label">Bike Features</label>
</div>

 
​
​

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$("$drop1").ready(function() {
 $(".mdb-select").materialSelect();
});
​
$("$drop2").ready(function() {
 $(".mdb-select").materialSelect();
});
​
arr = ["Honda", "Suzuki", "Hyundai"];
var select = document.getElementById("Drop1");
for (var i = 0; i < arr.length; i++) {
  var option = document.createElement("OPTION"),
    txt = document.createTextNode(arr[i]);
  option.appendChild(txt);
  option.setAttribute("value", arr[i]);
  select.insertBefore(option, select.lastChild);
}
​
var select1 = document.getElementById("Drop2");
for (var i = 0; i < arr.length; i++) {
  var options = document.createElement("OPTION"),
    txt = document.createTextNode(arr[i]);
  options.appendChild(txt);
  options.setAttribute("value", arr[i]);
  select1.insertBefore(options, select1.lastChild);
}

Console errors: 0