The correct option is A 600 members each from the First and Second estates, and 600 members from the Third Estate participated in the Estates General meeting.
In the Estates General Meeting of 5 May 1789, the Third Estate was represented by 600 members while the First and Second Estates had a total of 300 representatives. Together they formed the Estates-General, a political body that represented members of all the three estates. Only the monarch had the power to call the meeting.