The people who "discovered" the structure of the DNA molecule are:

a. Lewis &Clark

b. Schleiden & Schwann

c. Henderson & Hasselbeck

d. Watson & Crick

Watson & Crick

Explanation:

DNA is present as the genetic material of all the living organism. The DNA contains of the nitrogenous bases, pentose sugar and the phosphate group.

The X ray structure of the DNA was given by Franklin. The structure of the DNA molecule and its properties was fully explained by the Watson and crick. They explains the polarity, base pairing and the arrangement of the DNA structure.

Thus, the correct answer is option (d).