A n-p-n transistor conducts when

both collector and emitter are positive with respect to the base

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collector is positive and emitter is negative with respect to the base

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collector is positive and emitter is at same potential as the base

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both collector and emitter are negative with respect to the base

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Solution

The correct option is B collector is positive and emitter is negative with respect to the base
Inactive region emitter-base, the p-n junction is in FB & base-collector p-n junction is in RB.

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[