<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body>
<h2>Company Type</h2>
<p>Classification</p>
<div ng-app="Classification" ng-controller="myCtrl">
<form name="myForm">
<select name="classifications" ng-model="selectedClassifications" ng-options="x.class for x in classifications">
<option value="" disabled selected>-Select Classification-</option>
</select>
<p>Specific Type</p>
<select ng-model="selectedSpecificType" ng-options="y for y in selectedClassifications.type">
<option value="" disabled selected>-Select Type-</option>
</select>
<br>
<h2>Proposed Names</h2>
<p>Option 1</p>
<input type="text" name="option1" ng-model="option1" placeholder="Option 1" ng-pattern="selectedClassifications.regex" ng-disabled="!selectedClassifications || !selectedSpecificType">
<span style="color:red" ng-show="myForm.option1.$error.pattern">enter a valid name</span>
<br>
<p>Option 2</p>
<input type="text" placeholder="Option 2">
<br>
<input type="submit" ng-model="submit" ng-disabled="!selectedClassifications || !selectedSpecificType || !option1" value="Save and Continue">
<br>
</form>
</div>
<script> var app = angular.module('Classification', []);
app.controller('myCtrl', function($scope) {$scope.classifications = [
{class : 'BUSINESS NAME', type: ["BUSINESS NAME"], regex : /^[\s\w]+[^(ltd|limited|plc)]$/},
{class : 'COMPANY', type : ["PRIVATE COMPANY LIMITED BY SHARES", "PUBLIC COMPANY LIMITED BY SHARES", "PRIVATE COMPANY LIMITED BY GUARANTEE", "PUBLIC COMPANY LIMITED BY GUARANTEE", "PRIVATE UNLIMITED COMPANY", "PUBLIC UNLIMITED COMPANY"]},
{class : 'INCORPORATED TRUSTEE', type : ["INCORPORATED TRUSTEE"], regex : /^[\s\w]+[^(ltd|limited|plc)]$/}];
$scope.option1='';
});
</script>
</body>
</html>