Refer to the given reactions.
(i) Adenine `+X to `Adenosine
(ii) Adenosine `+Y to` Adenylic acid
What does X and Y represent here ?

Options

A. `{:(" X",," Y"),("Phosphate",,"Sugar molecule"):}`
B. `{:(" X",," Y"),("Sugar molecule",,"Phosphate group"):}`
C. `{:(" X",," Y"),("Sugar molecule",,"Nitrogenous base"):}`
D. `{:(" X",," Y"),("Nitrogenous base",,"Sugar molecule"):}`

Answer

B