For transistor action
(1) Base, emitter and collector regions should have similar size and doping concentrations.
(2) The base regions must be very thin and lightly doped.
(3) The emitter-base junction is forward biased and the base-collector junction is reverse biased.
(4) Both the emitter-base junction as well as the base-collector junction are forward biased.
Which of the following pairs of statements is correct?
(a) (4) and (1) (b) (1) and (2)
(c) (2) and (3) (d) (3) and (4)