|A) Rosalind Franklin and Maurice Wilkins||B) James Watson and Francis Crick|
|C) Rosalind Franklin and Francis Crick||D) James Watson and Maurice Wilkins|
In the early 1950s two scientists, Rosalind Franklin and Maurice Wilkins, studied DNA using x-rays. Franklin produced an x-ray photograph that allowed two other researchers, James Watson and Francis Crick to work out the 3D structure of DNA. The structure of DNA was found to be a double helix.