Which of the following statements correctly describes E1 reaction of alkyl halide?

Question

1.Rate=K*(Base)

2.Rate=K(Base)*RX

3.Rate=k*RX

4.Rearrangements are seen

$\begin{array}{1 1} 2\&4 \\ 3\&4 \\ 1\&2 \\ 2\&3\end{array}$