The relevant information is: It had a separate assembly for each of the three estates (clergy, nobility and commoners), which were called and dismissed by the king.
This justifies what answer for what question? Q & A:
Passage: In France under the Old Regime, the Estates General (French: Etats generaux) or States-General was a legislative and consultative assembly (see The Estates) of the different classes (or estates) of French subjects. It had a separate assembly for each of the three estates (clergy, nobility and commoners), which were called and dismissed by the king. It had no true power in its own right -- unlike the English parliament it was not required to approve royal taxation or legislation -- instead it functioned as an advisory body to the king, primarily by presenting petitions from the various estates and consulting on fiscal policy. The Estates General met intermittently until 1614 and only once afterwards, but was not definitively dissolved until after the French Revolution.

Question: Based on this passage, what was the composition of the estate general of france?
clergy , nobility and commoners