The easiest way of adding menu items  (to specify the options menu for an activity) is inflating an XML file into the Menu via MenuInflater. With menu_main.xml we can do it in this way:
A) @Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
B) @Override
public boolean onOptionsItemSelected(MenuItem item) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return super.onOptionsItemSelected(item);
}
C) @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.menu.menu_main);
}

Question

The easiest way of adding menu items  (to specify the options menu for an activity) is inflating an XML file into the Menu via MenuInflater. With menu_main.xml we can do it in this way:
A) @Override 
public boolean onCreateOptionsMenu(Menu menu) {    
getMenuInflater().inflate(R.menu.menu_main, menu);    
return true;
 }
B) @Override 
public boolean onOptionsItemSelected(MenuItem item) {  
getMenuInflater().inflate(R.menu.menu_main, menu);    
return super.onOptionsItemSelected(item);
 }
C) @Override 
protected void onCreate(Bundle savedInstanceState) {    
super.onCreate(savedInstanceState);    
setContentView(R.menu.menu_main);
 }

Quizplus · Accepted Answer

The onCreateOptionsMenu method is used to inflate the menu resource file into the Menu object, which is the correct way to add menu items to the options menu.

The Easiest Way of Adding Menu Items (To Specify the Options