For transistor action, which of the following statements are correct?

A. Base, Emitter and Collector region have similar size and doping concentrations.
B. The base must be very thin and lightly doped.
C. The emitter junction is forward biased and the collector junction is reverse biased.
D. Both emitter and collector junction all forward biased.

Choose the correct answer from the options given below:

B and C

The correct answer is Option (2) → B and C