Match the units in Column-$A$ with their equivalent values in Column-$B$ and select the correct option:

Column-$A$	Column-$B$
$1$. Femtometer	$(P)$. $10^{-3} \ \mu m$
$2$. Picometer	$(Q)$. $10^{-3} \ mm$
$3$. Nanometer	$(R)$. $10^{-3} \ pm$
$4$. Micrometer	$(S)$. $10^{-3} \ cm$
	$(W)$. $10^{-3} \ nm$

• A
  $1-P, 2-Q, 3-R, 4-S$
• B
  $1-R, 2-P, 3-W, 4-S$
• C
  $1-R, 2-W, 3-P, 4-Q$
• D
  $1-S, 2-Q, 3-P, 4-W$