Which incorrect about alkyl bromide

Which incorrect about alkyl bromide having molecular formula C5H11Br?

A. One isomeric alkyl bromide undergoes E1 elimination at the fastest rate B. Only one is incapable of reacting by the E2 mechanism C. Only one isomer gives a single alkene on E2 elimination D. 2-Bromopentane gives the most complex mixture of alkenes on E2 elimination

The correct answer: C. Only one isomer gives a single alkene on E2 elimination