The minimum weight outgoing edge $\{$u$,$ v$\}$ of a fragment T$\text{'}$

Question $11$ options:

sometimes belongs to the MST

may not belong to the MST

always belongs to the MST

may not belong to the MST$,$ if either u or v is a leaf of T$\text{'}$

belongs to the MST$,$ only if either u or v is a root of T$\text{'}$