If the SD of X is $\sigma_X$ then SD of $\large\frac{aX-b}{c}$ ( where a,b,c are constants ) is:

Question

(A) $\large\frac{a-b}{c}$$\sigma_X$ $\quad$(B) $\large\frac{a}{c}$$\sigma_X ^2$$\quad$ (C) $\large\frac { \left | a \right |} { \left | c \right |}$$ \sigma_X$ $\quad$ (D) $\large\frac { \left |\; a^2\;\right |} { \left | c^2 \right |}$$ \sigma_X ^2$