Synonym of COMMEMORATE

Answer: Option B

Boast : talk with excessive pride and self-satisfaction about one's achievements, possessions, or abilities.
Remember : have in or be able to bring to one's mind an awareness of (someone or something from the past).
Manipulate : handle or control (a tool, mechanism, information, etc.) in a skilful manner.
Harmonise : add notes to (a melody) to produce harmony.
Commemorate : recall and show respect for (someone or something).

Synonym of Commemorate is Remember