Correct option is A
Explanation:
"Adonais" is Shelley’s canonical elegy mourning the death of fellow Romantic poet John Keats.
Information Booster:
This long poem exemplifies elegiac themes, celebrating artistic legacy and exploring death, immortality, and grief.
Additional Knowledge:
"Alastor" is another poem by Shelley; "Ozymandias" is a sonnet unrelated to Keats.