Def Leppard are an English rock band formed in 1977 in Sheffield as part of the new wave of British heavy metal movement. The following is a complete list of all official members, session musicians, featured artists, touring musicians, and live guests of Def Leppard's career

Based on that paragraph can we conclude that this sentence is true?
Def Leppard has a record for number 1 hits

OPT:
(I). Yes;
(II). It's impossible to say;
(III). No;
(II).