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0. If set A = {1, 2, 3, 4}, then ordered pairs in the relation determined by the Hasse diagram in the figure given below, are described as
{(1, 1), (2, 2), (3, 3), (4, 4), (1, 3), (1, 4), (2, 3), (2, 4), (3, 4)}
(1, 1), (2, 2), (3, 3), (4, 4), (1, 2), (1, 3), (1, 4), (2, 3), (2, 4), (3, 4)}
both (a) and (b)
none of these
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