MCQ
Which of the following molecule has a planar structure ?
- A$O_2SF_2$
- B$OSF_2$
- ✓$XeF_4$
- D$ClO_4^-$

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(Given : atomic number $Sm =62 ; Eu =63 ; Tb =65 ; Gd =64, Pm =61 \text { ) }$
$A.$ $Sm$ $B.$ $Eu$ $C.$ $Tb$ $D.$ $Gd$ $E.$ $Pm$
Choose the correct answer from the options given below:

(Rounded off to the nearest integer)