A feature space, $($X$1,$ X$2,...,$ Xp$),$ with p dimensions was given to a data analyst $($DA$)$ to analyze the

data. DA found out there is a linear relationship between X$5$ and X$8,$ and X$8$ and Xp$,$ what is the

accurate dimension of the feature space?

a$.$ p

b$.$ p$-1$

c$.$ p$-2$

d$.$ p$-3$