You are given an array parent $=[0,1,2,3,4,5]$ representing the initial parent array of a Disjoint Set Union $($DSU$)$ data structure for $6$ vertices labelled from $0$ to $5.$ After performing the following operations in the given order, what will be the resulting parent array using the provided pseudocode?

unionSet$(1,2)$

unionSet$(3,4)$

unionSet$(2,4)$

unionSet$(1,4)$

$1.[0,1,1,1,1,5]$

$2.[0,1,1,3,2,5]$

$3.[0,1,2,1,3,5]$

$4.[0,1,1,1,3,5]$