Which of the following statements is incorrec | vedclass

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(B) Watson and Crick proposed the double-helical structure of $DNA$. $1$. The two strands of $DNA$ are antiparallel,meaning one runs in the $5' \right

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Both strands are not right-handed helices.

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(B) Watson and Crick proposed the double-helical structure of $DNA$. $1$. The two strands of $DNA$ are antiparallel,meaning one runs in the $5' \rightarrow 3'$ direction and the other in the $3' \rightarrow 5'$ direction. $2$. Both strands form a right-handed helix. Therefore,the statement that they are not right-handed is incorrect. $3$. According to Chargaff's rule,purines (Adenine and Guanine) always pair with pyrimidines (Thymine and Cytosine) via hydrogen bonds. $4$. The pitch of the helix is $3.4 \ nm$ or $34 \ \mathring{A}$,and there are $10$ base pairs per turn.

Which of the following statements is incorrect regarding the $DNA$ model proposed by Watson and Crick?

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Assertion $(A) :$ The distance between two polynucleotide chains in $\text{dsDNA}$ remains constant.
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