In an Hfr Strain, the F Episome Is Integrated Between

Multiple Choice

In an Hfr strain, the F episome is integrated between genes A and B.When this Hfr mates with an F⁻ strain, gene B is always transferred first to the F⁻ cell.What is the last bacterial gene that could possibly (at least in theory) be transferred to the F⁻ from the host chromosome?

A) a gene that is 90 minutes from gene A
B) a gene that is at 30 minutes from gene A
C) gene A
D) a gene that is at 60 minutes from gene A