For a transistor in CE mode to be used as an amplifier, it must be operated in :

Four NOR gates are connected as shown in figure. The truth table for the given figure is :

Identify the logic operation carried out by the given circuit :-

Statement I : By doping silicon semiconductor with pentavalent material, the electrons density increases.

Statement II : The n-type semiconductor has net negative charge.

In the light of the above statements, choose the most appropriate answer from the options given below :