________ is the rank of the largest equivalence relation on a set of 2

1.	________ is the rank of the largest equivalence relation on a set of 20 elements.
A.	3²⁰
B.	2⁴⁰⁰
C.	20
D.	1
Answer» E.

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________ is the rank of the largest equivalence relation on a set of 20 elements.

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