The upper and lower control limits for a component are $0\mathrm{.}150$ cm$.$ and $0\mathrm{.}120$ cm$.,$ with a process target of $\mathrm{.}135$ cm$.$ The process standard deviation is $0\mathrm{.}004$ cm$.$ and the process average is $0\mathrm{.}138$ cm$.$ What is the process capability index?

Question $16$ options:

A$)$

$1\mathrm{.}50$

B$)$

$1\mathrm{.}25$

C$)$

$1\mathrm{.}00$

D$)$

$1\mathrm{.}75$