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n-type semiconductor is doped with:

ATrivalent atom (B, Al)
BPentavalent atom (P, As, Sb) — donor
CSame atom
DInert gas
Answer & Solution
Correct answer: B. Pentavalent atom (P, As, Sb) — donor
Pentavalent dopants donate electron — extra e⁻ in conduction band. **Majority carriers:** electrons. Minority: holes. Donor energy level just below CB.
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