Which of the following relation is correct for boron element?

Here P = period number of boron

 N = number of valence electrons in boron

Given,

 P = period number of boron

 N = number of valence electrons in boron

Then $P_B\to 2$

$\mathit{B}\mathbf{\left(}\mathit{s}\mathbf{\right)}\mathbf{\to }\mathbf{1}{\mathit{s}}^{\mathbf{2}}\mathbf{,}\mathbf{ }\mathbf{2}{\mathit{s}}^{\mathbf{2}}\mathbf{,}\mathbf{ }\mathbf{2}{\mathit{p}}^{\mathbf{1}}$

Valence shell $2+1=3$

N = Valence shell electron $=3$

$p+1=3=N$

$P+1=N$

Hence, the option C is correct