Question: Which of the following statements is true? a. A gap can appear in a sequence created with the NOCACHE option if the system crashes before

Which of the following statements is true?
a. A gap can appear in a sequence created with the NOCACHE option if the system crashes before a user can commit a transaction.
b. Any unassigned sequence values appears in the USER_SEQUENCE data dictionary table as unassigned.
c. Only the user who creates a sequence is allowed to delete it.
d. Only the user who created a sequence is allowed to use the value generated by the sequence.

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