$4-$ list$1$ is an arraylist which stores integer values.

What will be the output of the following code segment?

list$1.$add$(1)$;

list$1.$add$(2)$;

list$1.$add$(3)$;

list$1.$remove$(1)$;

System.out.println$($list$1)$;

a$)1,2$

b$)1,2,3$

c$)2,3$

d$)1,3$

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