In how many ways can 5 keys be put in a ring

1.	In how many ways can 5 keys be put in a ring
A.	\[\frac{1}{2}4!\]
B.	\[\frac{1}{2}5\,!\]
C.	\[4\,!\]
D.	\[5\,!\]
Answer» B. \[\frac{1}{2}5\,!\]

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In how many ways can 5 keys be put in a ring

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