Let G be a group of order 20 in which the conjugacy classes have size – McqOptions

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1.	Let G be a group of order 20 in which the conjugacy classes have sizes 1, 4, 5, 5, 5. Then which of the followings is/are TRUE ?
A.	G contains a normal subgroup of order 1.
B.	G contains a non-normal subgroup of order 5.
C.	G contains a subgroup of order 10.
D.	G contains a normal subgroup of order 4.
Answer» D. G contains a normal subgroup of order 4.

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