It was really a gracious occasion for me.

Answer: Option C

Gracious : courteous, kind, and pleasant, especially towards someone of lower social status.
Benign : gentle and kind.
Infructuous : pointless or unnecessary.
Churlish : rude in a mean-spirited and surly way.
Wasteful : (of a person, action, or process) using or expending something of value carelessly, extravagantly, or to no purpose.

Antonym of Gracious is Churlish