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Which of the following is equivalent to $ { \left( 2{ x }^{ n }{ y }^{ 2 } \right) }^{ 3 } $?

$ 2{ x }^{ 3n }{ y }^{ 6 } $

$ 6{ x }^{ n+3 }{ y }^{ 5 } $

$ 9{ x }^{ 3n }{ y }^{ 5 } $

$ 8{ x }^{ 3n }{ y }^{ 6 } $