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Write a definition of predicate prefix ( X , Y ) , which is true just when list X is a prefix of list Y

Write a definition of predicate prefix(X, Y), which is true just when list X is a prefix of list Y.
For example, prefix([2,4,6],[2,4,6,8,10]) is true. Every list is a prefix of itself.
Which of the following is a correct definition of prefix?
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prefix(X,[A|Y]) :- append(A,X,Y).
prefix([],[]).
prefix([A|X],[B|Y]) :- prefix(A,X), prefix(B,Y).
prefix([],X).
prefix([A|X],[A|Y]) :- prefix(A,X), prefix(A,Y).
prefix([],Y).
prefix([A|X],[A|Y]) :- prefix(X,Y).

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