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Which of the following is correct order ...

Which of the following is correct order of size `M^(3+)` ions of Ce(58), Sm(62), Dy(66), and Yb(70)?
`Ce gt Sm gt Dy gt Yb`
`Yb gt Dy gt Sm gt Ce`
`Ce gt Dy gt Sm gt Yb`
`Ce gt Dy = Sm gt Yb`

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