Answer:GCCGATTAGCGG
Explanation:
Chargaff base pairing rule state that the ratio of purines to pyrimidine in a specific DNA from any cell or specie must be equal in 1:1 ratio. In chargaff base pairing rule Cytosine C will pair with Guanine G on the complementary strand and Adenine A will pair with Thymine T on the complementary strand. C=G, A=T
So if the sequence 5' CGGCTAATCGCC 3' on the complementary strand will be
3' GCCGATTAGCGG 5'