Which one of the following palindromic bases sequences in DNA, can be easily cut at about the middle by some particular restriction enzyme?
a. 5' CACGTA 3' and 3' CTCAGT 5'
b. 5' CGTTCG 3' and 3' ATGGTA 5'
c. 5' GATATC 3' and 3' CTACTA 5'
d. 5' GAATTC 3' and 3' CTTAAG 5'