The correct answer is Option D.
ORIGINAL means something that is real, something that exists from the beginning and something that is created and is not a copy.
The word that means the opposite of original will be FEIGN.
FEIGN means FAKE and PRETENSE.
The remaining options are incorrect because:
CONDONE means accept something with reluctance.
ATTEND means to be present.
WILLING means to be ready and eager to do something.