Consider a converging nozzle with a low velocity at the inlet and sonic velocity at the exit

Question:

Consider a converging nozzle with a low velocity at the inlet and sonic velocity at the exit plane. Now the nozzle exit diameter is reduced by half while the nozzle inlet temperature and pressure are maintained the same. The nozzle exit velocity will
(a) Remain the same
(b) double
(c) quadruple
(d) Go down by half
(e) go down to one-fourth