Answer: The correct answer is-
GGATCCATT.
DNA replication is a process of formation of two molecules of DNA using single molecule of DNA ( which is double stranded).
In this process, two strands are first separated and act like template strand, using which enzyme DNA polymerase adds dNTPs ( deoxyribonucleoside triphosphate) complementary to the template strand in the direction 5' to 3'.
According to Watson and Crick base pairing, Adenine ( A) in the template DNA pairs with Thymine (T) and Guanine (G) pairs with Cytosine (C) during the process of replication of DNA.
The sequence of original DNA strand is- CCTAGGTAA
Thus, complementary strand would be- GGATCCATT