AngularJS Example:

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div ng-app>
  <h2>Todo</h2>
  <div ng-controller="TodoCtrl">
   <select ng-model="selectedVal" ng-init="selectedVal=0">
         <option value="0">--Select--</option>
         <option value="1">Individual</option>
         <option value="2">Business</option>
         <option value="3">Others</option>
    </select>
    
    <div ng-switch="selectedVal">
      <div ng-switch-when="1" id="individual">Individual</div>
      <div ng-switch-when="2" id="bussiness">Bussiness</div>
      <div ng-switch-when="3" id="Others">Others</div>
      <div ng-switch-default></div>
    </div>
  </div>
</div>

CSS

.done-true {
  text-decoration: line-through;
  color: grey;
}

JavaScript

function TodoCtrl($scope) {
 
}