# The statement that are true for the long form of periodic table are :(i) It reflects the sequence of filling the electrons in the order of sub energy levels s,p,d and f (ii)It helps predict the stable valency states of the elements

$(a)\;\text {(i) and (ii)} \\(b)\;\text {(i) alone } \\ (c)\;\text {(ii) alone} \\ (d)\;\text {None}$

Both statements are true.
Hence a is the correct answer.