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How much time on an average does the LDR take for it’s resistance to change when light is incident?

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How much time on an average does the LDR take for it’s resistance to change when light is incident?

(a) 8 to 12 ms

(b) 12 min

(c) 30 s

(d) 354 hr

The question was posed to me in quiz.

The question is from LDR Sensor in section Interfacing of Sensors, Actuators, and Other Modules of Arduino

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The correct option is (a) 8 to 12 ms

To explain I would say: 8 to 12ms is the correct value of the time that an average LDR takes for its resistance to change in response to the light incident on it. It also takes about a second approximately for the resistance to rise back up to its initial value when no light is incident.

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