Study the following program:

$1.$ z $="$xyz$"$

$2.$ j $="$j$"$

$3.$ while j in z:

$4.$ print$($j$,$ end$="")$

What will be the output of this statement?

a$.$

xyz

b$.$

No output

c$.$

x y z

d$.$

j j j j j j j