What is the output of following code segment?

def bar$($list$)$:

list. append$(3)$

list.pop$(1)$

list. remove$(5)$

return list

$a=[1,3,5,1,3,5,1]$

print$($bar$($a$))$

$1,3,3,5,1,3$

$3,3,1,5,3,1$

$1,1,3,5,1,3$

$3,1,3,5,3,1$