Applying 2-value boundary value analysis which of the following options has the correct test set of valid and invalid boundary values?

Duration – The duration of operation, in whole minutes, each time it is switched on, ranging from 1 to 60

Applying 2-value boundary value analysis which of the following options has the correct test set of valid and invalid boundary values?
A . Frequency 1, 5; Duration 1, 60
B . Frequency 0, 1, 5, 6; Duration 59 seconds, 1 minute, 60 minutes, 60 minutes 1 second
C . Frequency 0, 1, 5, 6; Duration 0, 1, 60, 61
D . Frequency 0, 1, 2, 5, 6; Duration 0, 1, 30, 60, 61

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Answer: B