Which of the following is an illegal array initialization statement?

Question $11$ options:

var n $=$ new Array$(10,20,30,40,50)$;

var n $=[10,20,30,40,50]$;

var n$[10,20,30,40,50]$;

var n $=$ new Array$(5)$;

$$ for $($ var i $=1$; i $<=5$; i$++)$

$$n$[$ i $]=$ i $*10$ ;