What is the output of following code segment?

def bar$($list$)$:

list $.$ append$(3)$

list.pop$(1)$

list. remove$(5)$

return list

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

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}()$

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

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

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

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