Which of the following numbers is the next sequence number of 77₈ in the octal number system?

Which of the following numbers is the next sequence number of 77₈ in the octal number system?

a) 88
b) 80
c) 100
d) 99

From the BPSC Sub-Assistant Maintenance Engineer October 2022 – Written exam, question 8 of 103.

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