[A] : Organisms that bear large number of common amino acid sequence may be con- sidered to be more closely related than to those with greatly different amino acid se- quence.
[R]: The proteins are chemical finger prints of evolutionary history because they bear amino acid sequences that have changed as a re- sult of genetic change

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

A