Given are two sets, X and Y wherein X is a set of positive integers less than 10 and Y is a set of first 4-prime numbers. Find Y – X
a.{ }
b.{1, 2, 3, 4, 5, 6, 7, 8, 9}
c {1, 4, 6, 8, 9}
d.{2, 3, 5, 7}
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