In an arson prosecution the government seeks to rebut Defendant's alibi that he was in a jail in another state at the time of the fire. The government calls Witness to testify that he diligently searched through all the records of the jail and found no record of Defendant's having been incarcerated there during the time Defendant specified. The testimony of Witness is
admissible as evidence of absence of an entry from a public record. admissible as a summary of voluminous documents. inadmissible, because it is hearsay not within any exception.  inadmissible, because the records themselves must be produced.