A. Inflexible
B. Bitter
C. Good-natured
D. Sarcastic
✅ The correct answer is option D.
Inflexible : unwilling to change or compromise.
Inflexible : unwilling to change or compromise.
Bitter : having a sharp, pungent taste or smell; not sweet.
Good-natured : kind, friendly, and patient.
Sarcastic : Ironic.
Ironic : marked by or given to using irony in order to mock or convey contempt.
Synonym of Ironic is Sarcastic