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:

Option A = p- and n- types respectively

Explanation

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