There is no single subset for a set containing the elements 3, 4, 5, and 6. In set theory, a subset is any set B in which all of its members are present in some other set A. In this case: [math]A = \{ 3, 4, 5, 6 \}[/math] We use something called the power set, which is a set containing all the valid subsets of some set A.Answer: