Which one of the following statements is false about the code below?

def $g($inp$)$:

if type$($inp$)!=$ list:

return False

else:

return inp.extend$($inp $[$:$\text{'}-1]$

Ist $=[4,5,6]$

lst$)$

The function $g()$ returns False if the given argument inp is not a list.

inp.extend$()$ returns None.

The content of the list Ist is not changed after the call Ist