Consider the DataFrame df$.$

A B

$012\mathrm{.}032\mathrm{.}0$

$163\mathrm{.}0$ NaN

$2$ NaN $23\mathrm{.}0$

$324\mathrm{.}041\mathrm{.}0$

$412\mathrm{.}032\mathrm{.}0$

Complete the code to return the output.

print$($df $\_\_\_)$

A B

$012\mathrm{.}032\mathrm{.}0$

$163\mathrm{.}0$ NaN

$2$ NaN $23\mathrm{.}0$

$324\mathrm{.}041\mathrm{.}0$

$.$drop$\_$na$()$

$.$unique$()$

$.$unique$\_$all$()$

$.$drop$\_$duplicates$()$