how to load level when your enemy health gets to 0

I want to load my main menu when my enemy health gets to 0

here's the code for my enemy health

 private void HandleAnswer(int answer) {
  
          if (answer == 1)
         {
  
          ShowIncorrect = false;
                         ShowCorrect = true;
          Poop = false;
  
          animation.PlayQueued("Wrong answer",QueueMode.PlayNow);  
         Enemy.animation.PlayQueued("ENMattck",QueueMode.CompleteOthers);
          NextQuestion(); 
        }
  
         else { 
          ShowIncorrect = true;
           ShowCorrect = false;
          Poop = false;
  
  
          animation.PlayQueued ("Wrong answer",QueueMode.PlayNow);  
          Enemy.animation.PlayQueued("ENMattck", QueueMode.CompleteOthers);
 
 //okay so i want to put the code here
 //so when my enemy hp go 0 my main menu will load
 //Application.LoadLevel("MainMenu");
  
        }
     }