P-type semiconductor is formed when: | vedclass

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(C) $P-$type semiconductor is formed by doping an intrinsic semiconductor (like $Si$ or $Ge$ from Group $14$) with a trivalent impurity (from Group $1

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$B$ and $C$

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(C) $P-$type semiconductor is formed by doping an intrinsic semiconductor (like $Si$ or $Ge$ from Group $14$) with a trivalent impurity (from Group $13$).$Al$ (Aluminum) and $B$ (Boron) are trivalent elements.$As$ (Arsenic) and $P$ (Phosphorus) are pentavalent elements,which form $N-$type semiconductors.Therefore,mixing $Al$ in $Si$ (Option $B$) and $B$ in $Ge$ (Option $C$) results in $P-$type semiconductors.Thus,the correct combination is $B$ and $C$.

$P-$type semiconductor is formed when:

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