Which of the following options is incorrect r | vedclass

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(D) According to Chargaff's rules for double-stranded $DNA$:$1$. The amount of Adenine $(A)$ is equal to the amount of Thymine $(T)$,so $A = T$.$2$. T

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$A + T = G + C$

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(D) According to Chargaff's rules for double-stranded $DNA$:$1$. The amount of Adenine $(A)$ is equal to the amount of Thymine $(T)$,so $A = T$.$2$. The amount of Cytosine $(C)$ is equal to the amount of Guanine $(G)$,so $C = G$.$3$. Consequently,the sum of purines $(A + G)$ is equal to the sum of pyrimidines $(T + C)$,so $A + G = T + C$.$4$. The ratio $(A + T) / (G + C)$ is constant for a given species but varies between different species. Therefore,the statement $A + T = G + C$ is not a universal rule and is generally incorrect.

Which of the following options is incorrect regarding $DNA$ base pairing rules (Chargaff's rules)?

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