Recognise the figure and find out the correct matching .
A. a-adenine,b-thymine,c-adenylic acid,d-uridylic acid
B. a-adenine,b-uracil, c-adenosine,d-uridine
C. a-guanine,b-thymine, c-adenosine, d-uridine
D. a-adenine, b-cytosine, c-adenylic acid, d-uridylic acid
