When the mains input range is voltage: 150-260VAC, frequency: 45-60Hz, what is the working range of UPS?

When the mains input range is voltage: 150-260VAC, frequency: 45-60Hz, what is the working range of UPS?
A . 110-280V, 40-70HZ
B . 180-280V, 50-90HZ
C . 120-360V, 50-70HZ

Answer: A

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