Explanation

According to Chargaff’s rule, the total amount of adenine released is equal to the total amount of thymine and similarly total amount of cytosine is equal to total amount of guanine, $i.e.,$ A=T band C=G. It also states that in natural DNAs, the base ratio A/T is close to unity and C/G is also close to unity (A+C+=T+G). Thus, in the given option, except A+T=C+G, all are correct.