The conductivity of intrinsic semiconductors can be increased by adding a suitable impurity . This process is called `underline(A)` . This can be done with an impurity which is Such impurities introduce `underline(B)` rich or deficient as compared to the semiconductor. Such impurities introduce `underline(C)` defects in them. Electron rich impurities result in D type semiconductors while electron deficit impurities result in E type semiconductors .

Options

A. `{:(A,B,C,D,E),("doping", "proton", "point", p,n):}`
B. `{:(A,B,C,D,E),("doping", "electron", "stoichiometric", p,n):}`
C. `{:(A,B,C,D,E),("energy gap", "proton", "impurity", n,p):}`
D. `{:(A,B,C,D,E),("doping", "electron", "electronic", n,p):}`

Answer

D