In each of the following questions find out the alternative which will replace the question mark. Zenith : Nadir :: ?:?

Zenith means the time at which something is most powerful and Nadir means the lowest or most unsuccessful point in a situation. Both words are opposite to each other.

Genuine means authentic and phony means fraudulent or not genuine. Both are also opposite in meaning.

Zenith : Nadir :: Genuine : Phony