Which of the Following Statements Is/are Incorrect

Multiple Choice

Which of the following statements is/are incorrect?
i.For each value of n the number of sublevels is also n
ii.There is an s sublevel for every value of n
iii.Some principal energy levels have no f sublevels
iv.There is no d sublevel when n = 3

A) i only
B) ii only
C) iii only
D) iv only
E) ii and iv