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Electronic configuration of germanium is 2, 8, 18 and 4.To make it extrinsic semiconductor, small quantity of antimony is added. Then

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the material obtained will be n-type germanium in which electrons and holes are equal in number

the material obtained will be p-type germanium

the material obtained will be n-type germanium which has more electrons than holes at room temperature

the material obtained will be n-type germanium which has less electrons than holes at room temperature

answer is C.

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Detailed Solution

Antimony is a fifth-group impurity(Arsenic, Antimony and phosphorus etc ) and is therefore a donor of electrons.

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