Que: Suppose that H be an X-set and suppose that a∼b and |Xₐ|=|Xᵦ|, the which of the following is true?

a. Xₐ is powerset of Xᵦ
b. Xₐ is isomorphic to Xᵦ
c. Xₐ is homomorphic to Xᵦ
d. Xᵦ is the subset of Xₐ
Answer: Xₐ is isomorphic to Xᵦ

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