Answer
The values of $m_l$ can be $~~~m_l = -1, 0, 1, 2$
Work Step by Step
The $3d$ subshell has $l = 2$
In general, the allowed values of $m_l$ are $~~m_l = 0, \pm 1, \pm 2,...,\pm l$
If $l=2,$ then the allowed values of $m_l$ are $~~m_l = 0, \pm 1, \pm 2$
Of the values given in the question:
The values of $m_l$ can be $~~~m_l = -1, 0, 1, 2$
