5 |GAAGTTCCTATGC||CGAAGTTCCTATTC||TCTAGAAA||GTATAGGAACTTC 3 3 CTTCAAGGATACG||GCTTCAAGGATAAG||AGATCTTT||CATATCCTTGAAG 5

• A. n If the DNA segments are named a, b, c and d respectively; and d is in opposite orientation to a and b, which of the following is dispensable for recombianse action?
• B. a
• C. b
• D. c
• E. d