If X is a random variable follows Binomial distribution with two parameters n and p$.$ What is the variance V$($X$)?$

$($i$)$ V$($X$)=$ np

$($ii$)$ V$($X$)=$ np$(1-$p$)$

$($iii$)$ V$($X$)=$np$(1-$p$)$

$($iv$)$ None of these