Reactants of reaction -I are : `CH_(3)CONH_(2),KOH,Br_(2)`
Reactants of reaction-II are : `CH_(3)NH_(2), CHCl_(3), KOH`
The intermediate species of reaction-I and reaction-II are respectively.
A. Carbonium ion, carbene
B. Alkyl isocyanate, carbene
C. Carbene, nitrene
D. Carbocation, carbanion