Chargaff' s rule states or Which one of the following ratio constant in DNA of different species

Options

A. A+G = T+C
B. A+T=G+C
C. A+C = T+C
D. All of the above

Answer

A

Explanation

Chargaff’s rules states that DNA from only cell of all organisms should have a (1 : 1) ratio of pyrimidine and purine bases and more specifically that the amount of guanine is equal to cytosine amount of adenine is equal to thymine.