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What is the operating voltage of Atmega328?

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What is the operating voltage of Atmega328?

(a) 12V to 9V

(b) 1.9V to 5V

(c) 1.8V to 5.5V

(d) 1.1V to 5V

I have been asked this question in an internship interview.

My query is from Microcontroller Specifications in chapter AtMega Microcontroller Specifications of Arduino

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Right option is (c) 1.8V to 5.5V

The best I can explain: The operating voltage of the Atmega328 is 1.8V to 5.5V. Provide any voltage lower than that and the chip will not function. But however, if any voltage higher than the rated voltage is provided there is a chance of damaging the IC physically. So, under no circumstance should this chip be provided a voltage more than the rated voltage.

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