According to shell model, last nucleon of ${?}_8^{17}O$ is in which of the following state?

$($a$)([3],[2])$

$($b$)(\frac{5}{2}{)}^{+}$

$($c$)(\frac{7}{2})$

$($d$)(\frac{9}{2}{)}^{+}$

$($a$)17$

$($b$)$

$($c$)$

$($d$)$