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Given figure represents the DNA double helix model as proposed by Watson and Crick (1953). Select the option
\( \mathrm{P} \) that shows correct measurements of \( A, B \) and \( C \).

W
(a) \( A-3.4 \mathrm{~nm}, B-0.34 \mathrm{~nm}, C-2 \mathrm{~nm} \)
(b) \( A-34 \mathrm{~nm}, B-3.4 \mathrm{~nm}, \quad C-20 \mathrm{~nm} \)
(c) \( A-3.4 \AA, B-0.34 \AA, C-20 \AA \)
(d) \( A-34 \AA, \quad B-3.4 \AA, \quad C-2 \AA \)
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