MCQ
Select the odd one
  • A
    $4f$
  • B
    $5d$
  • $3s$
  • D
    $4p$

Answer

Correct option: C.
$3s$
c
$n+l$

$4 f \Rightarrow 4+3=7$

$5 d \Rightarrow 5+2=7$

$3 s \Rightarrow 3+0=3$

$6 p \Rightarrow 6+1=7$

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