The composer of Serenade for Strings in C major, Op. 48 was awarded a lifetime pension by what emperor?
Serenade for Strings (Tchaikovsky): Tchaikovsky's Serenade for Strings in C major, Op. 48, was composed in 1880. Pyotr Ilyich Tchaikovsky:  Tchaikovsky was honored in 1884, by Emperor Alexander III, and awarded a lifetime pension.
Emperor Alexander III