\[\begin{array}{1 1}(1)4&(2)6\\(3)2&(4)256\end{array}\]

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Getting an even number is considered a success

Probability success $p= \large\frac{3}{6} =\frac{1}{2}$

$q= 1-p=1- \large\frac{1}{2}$

$\qquad=\large\frac{1}{2}$

$n=16$

$S.D=\sqrt {npq}$

Variance $=S.D^2$

$\qquad= npq$

$\qquad= 16 \times \large\frac{1}{2} \times \frac{1}{2}$

$\qquad=4$

Hence 1 is the correct answer.

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