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Which 4-tuples are in the relation {(a, b, c, d) | a, b, c, and d...

Which 4-tuples are in the relation {(a, b, c, d) | a, b, c, and d are positive integers with abcd = 6}

a.

{(6, 1, 1, 1), (1, 6, 1, 1), (1, 1, 6, 1), (1, 1, 1, 6), (3, 2, 1, 1), (3, 1, 2, 1), (3, 1, 1, 2), (2, 3, 1, 1), (2, 1, 3, 1), (2, 1, 1, 3), (1, 3, 2, 1), (1, 3, 1, 2), (1, 2, 3, 1), (1, 2, 1, 3), (1, 1, 3, 2), (1,6, 2, 3)}
b.

{(6, 1, 1, 1), (1, 6, 1, 1), (1, 1, 6, 1), (1, 1, 1, 6), (3, 2, 1, 1), (3, 1, 2, 1), (3, 1, 1, 2), (2, 3, 1, 1), (2, 2, 3, 1), (2, 1, 1, 3), (1, 3, 2, 1), (1, 3, 1, 2), (1, 2, 3, 1), (1, 2, 1, 3), (1, 1, 3, 2), (1, 1, 2, 3)}
c.

{(6, 1, 1, 1), (1, 6, 1, 1), (1, 1, 6, 1), (1, 1, 1, 6), (3, 2, 1, 1), (3, 1, 2, 1), (3, 1, 1, 2), (2, 3, 1, 1), (2, 1, 3, 1), (2, 1, 1, 3), (1, 3, 2, 1), (1, 3, 3, 2), (1, 2, 3, 1), (1, 2, 1, 3), (1, 1, 3, 2), (1, 1, 2, 3)}
d.

{(6, 1, 1, 1), (1, 6, 1, 1), (1, 1, 6, 1), (1, 1, 1, 6), (3, 2, 1, 1), (3, 1, 2, 1), (3, 1, 1, 2), (2, 3, 1, 1), (2, 1, 3, 1), (2, 1, 1, 3), (1, 3, 2, 1), (1, 3, 1, 2), (1, 2, 3, 1), (1, 2, 1, 3), (1, 1, 3, 2), (1, 1, 2, 3)}
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Answer #1 
4-tuples are in the relation {(a, b, c, d) | a, b, c, and d are positive integers with abcd = 6} is

{(6, 1, 1, 1), (1, 6, 1, 1), (1, 1, 6, 1), (1, 1, 1, 6), (3, 2, 1, 1), (3, 1, 2, 1), (3, 1, 1, 2), (2, 3, 1, 1), (2, 1, 3, 1), (2, 1, 1, 3), (1, 3, 2, 1), (1, 3, 1, 2), (1, 2, 3, 1), (1, 2, 1, 3), (1, 1, 3, 2), (1, 1, 2, 3)}

So, answer is option d



Option d
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