Intermediates formed during reaction of $RCNH_2$ with $Br_2$ and $KOH$ are

Question

$\begin{array}{1 1} RCONHBr\;and\;RNCO \\RNHCOBr \;and\;RNCO \\ RNCO \\ None\;of\;the \;above \end{array} $