# Suppose a population a has 100 observations 101, 102, ..., 200 and another population $B$ has 100 observations 151, 152, ...., 250. If $V_A$ and $V_B$ represent the variances of the two population respectively, then $\frac{V_A}{V_B}$ is :
( A ) $1$
( B ) $\frac{2}{3}$
( C ) $\frac{4}{9}$
( D ) $\frac{9}{4}$