Beryllium does not react directly with hydrogen unlike other alkaline earth metals to form ionic hydride. This is because the oxidation potential of beryllium is very low and thus it does not donate its electrons easily to hydrogen.
Because Bromine (Br) isn't part of the original formula for Apirin. (I answered this based on the assumption that the letter "A" in option C was a typo of sorts, since there is no element with a chemical symbol of just "A" that I am aware of. If this is incorrect, then I apologize.)