The correct option is D ununennium
While studying the nomenclature of elements with an atomic number greater than 100, it was found that some elements are given two symbols or names. Most of these elements have been assigned their symbols and names but still are not used universally.
Hence, The IUPAC gives a clear rule of the systematic nomenclature of elements with an atomic number above 100.
119→ ununennium
For 1→ un
9→ enn is used.