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Silicon doped with aluminum and germanium doped with arse...

Silicon doped with aluminum and germanium doped with arsenic become?

A.

p- and n- types respectively

B.

n- en p- type respectively

C.

p- type semiconductor

D.

n- type semiconductors

Correct answer is A

When silicon, a four valency element, is doped with aluminum, a three valency element, a p-type semiconductor is produced where the major carriers are the electrons.
Thus, the correct option is p-type and n-type respectively