Ligation reactions occur most efficiently between DNA fragments:
a. that have sticky ends.
b. that have blunt ends. that have complementary sticky ends.
c. that are cleaved with different restriction enzymes.
d. where one fragment has a sticky end and the other has a blunt end.

Explanation:

The sealing of nicks between two adjacent residues of a single-strand(ss) break on a double-strand DNA and the joining of double-strand breaks.

This is enzymatically catalyzed by the enzyme DNA ligase.

DNA ligation is the joining ends of 2 DNA molecules by the enzyme, DNA ligase. DNA ligase catalyzes the formation of two covalent phosphodiester bonds between the 3' hydroxyl group of one nucleotides and the 5' phosphate group of another and it is  an ATP dependent reaction.

DNA Ligation  occur most efficiently between those  DNA fragments  that have complementary sticky ends.

true is the final answer!

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: