A scientist is purifying DNA from a bacterium. During the purification process, a preparation is obtained that contains only four molecules. Some components of these molecules are listed in this table. Which of the four molecules is the DNA, based on the table ?

a
Molecule 4
b
Molecule 2
c
Molecule 3
d
Molecule 1

The question does not provide a table or any information on the components of the molecules. Therefore, it is not possible to determine which molecule is the DNA based on the given information.