@Override
	public Collection<?> changeSorting(int choice) {
		// TODO Auto-generated method stub
		Comparator<Questions> c=null;
		if(choice==1)
			c=new sortOnQuesRank();
		else if(choice==2)
			c=new sortOnQuesVotes();
		else
			;
		
		Collections.sort(lst, c);
		
		return lst;
	}