Answer:
Sequence A is circular, sequence B is linear.
Explanation:
Restriction enzymes is also known as the molecular scissors that cuts the specific DNA fragments. Two main types of restriction enzymes are restriction exonuclease and restriction endonuclease.
The DNA fragments that are digested by the restriction endonuclease can be used for the preparation of the maps. The circular DNA ganaretes the equal number of fragments as it has the restriction site and linear DNA produce one extra fragments.
Thus, the correct answer is option (D).