A bidirectional enhancer has the following sequence:
5′–GTCA–3′ 3′–CAGT–5′ Which of the following sequences would also be a functional enhancer?
a. 5′–ACTG–3′ 3′–TGAC–5′
b. 5′–TGAC–3′ 3′–ACTG–5′
c. 3′–GTCA–5′ 5′–CAGT–3′
d. 3′–TGAC–5′ 5′–ACTG–3′