Answer:
The correct statement is-
They used Chargaff's rule to determine that it contains ribose sugar.
They used Franklin's photo to determine that DNA was a double helix.
Explanation:
Watson and Crick used pieces of information available from different researchers such as Chargaff's rules and Franklin.
Chargaff had explained that of the four kinds of nucleotides are present in a DNA molecule in such a manner that 2 types of nucleotides were always present in the same amounts and the other 2 types of nucleotides were also always present in same amounts.
The first X-ray picture of DNA, created by Rosalind Franklin using a technique known as X-ray crystallography, which led to Watson and Crick's model of DNA. It explained the helical shape of the DNA molecule.
The correct statement is-
They used Chargaff's rule to determine that it contains ribose sugar.
They used Franklin's photo to determine that DNA was a double helix.
