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Perfect resolution is possible when?

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Perfect resolution is possible when?

(a) sampling rate greater than thrice the bandwidth of the signal

(b) sampling rate greater than twice the bandwidth of the signal

(c) sampling rate less than twice the bandwidth of the signal

(d) sampling rate less than thrice the bandwidth of the signal

This question was posed to me during an interview.

My question comes from Analog to Digital Converter topic in section Sensors of IOT

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Correct choice is (b) sampling rate greater than twice the bandwidth of the signal

For explanation I would say: If an ADC operates at the sampling rate greater than twice the bandwidth of the signal, then perfect reconstruction is possible given an ideal ADC and neglecting quantization error.

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