How to select the rows having same id and have all missing value in another column

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猫巷女王i
猫巷女王i 2021-02-07 12:06

I have the following dataframe:

ID  col_1
1    NaN
2    NaN
3    4.0
2    NaN
2    NaN
3    NaN
3    3.0
1    NaN

I need the following output:

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