The correct option is D depression
Ecstasy means an overwhelming feeling of great happiness or joyful excitement. The opposite of ecstasy is depression or feelings of severe despondency and dejection. Hence, Option A is correct. Among the rest of the options, pain means highly unpleasant physical sensation caused by illness or injury, disappointment means sadness or displeasure caused by the non-fulfilment of one's hopes or expectations, trance means a half-conscious state characterized by an absence of response to external stimuli. These do not express this antonym, hence incorrect.