Watson Crick model of DNA was proposed on the basis of
(A) X-ray crystallography> X-ray crystallography theoretically offered the opportunity to reveal the molecular structure of large molecules like proteins and DNA, but there were serious technical problems then preventing X-ray crystallography from being applicable to such large molecules.
X-ray crystallography
Chromatography
Gel electrophoresis
X-ray diffraction studies
Miscellaneous (Bio-Chemistry)