switch case

hello ! i m a beginner in java. Kindly help me to solve this question.

Wat’ll happen when u compile and run this code

public class MySwitch{

public static void main(String argv[]){

MySwitch ms=new MySwitch();

ms.amethod();

}

public void amethod(){

int k=10;

switch(k){

default: // do nothing

System.out.println("this is the default output");

break;

case 10; System.out.println("ten");

case 20: System.out.println("twenty");break;

}

}

}

Options:

1. none of these options

2. Compile time error target of switch must be an integral type

3.Compile and run with output " thid is the default output"

4.Compile and run with output of the single line "ten"