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Question

X-ray diffraction photomicrographs of DNA used for preparing DNA model by Watson and Crick were obtained by
  1. Bragg
  2. Kirkpatrick
  3. Astbury and Franklin
  4. White.

A
Bragg
B
White.
C
Kirkpatrick
D
Astbury and Franklin
Solution
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William Astbury, a British scientist, obtained the first X-ray diffraction pattern of DNA. X-ray diffraction patterns of crystallized molecules can reveal their structures with atomic precision.
Rosalind Franklin's X-ray diffraction patterns of DNA molecules rendered the important clue that DNA has the structure of a double helix.
Hence the correct answer is (C)

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