Correct Answer - Option 1 : Past, future
The correct answer is Past, future.
Nostalgia means a feeling of pleasure and also slight sadness when you think about things that happened in the past.
Anticipation means a feeling of excitement about something that is going to happen in the near future.
In short, nostalgia means thinking about the past and anticipation means thinking about the future.
Thus, Nostalgia is to anticipation as past is to future.