Fireflies light up due to the activity of the following

Select the word which means the same as the group of words given.

Cure for all problems and diseases

a person who is skilled in many different areas or subjects

Choose the word that can substitute the given group of words.

  One who hates institution of marriage

Identify the incorrect pair:

Cordial 

Select the most appropriate synonym of the bold word in the given sentence.

The promises made by the old minister were fulfilled.

Select the most appropriate meaning of the given idiom. "Go down like a lead balloon"

Select the most appropriate ANTONYM of the bold  word.  

NAB