Option 1: Hobbes - Thomas Hobbes is not the correct answer. Hobbes believed in the social contract theory, where individuals surrender some of their rights in exchange for protection and security from the government. He did not emphasize obedience to the general will as a concept of liberty.
Option 2: Rousseau - Jean-Jacques Rousseau is the correct answer. Rousseau believed that liberty consists of obedience to the general will, which is the collective decision-making of the entire community and represents the common good. He argued that individuals should abide by the decisions made through democratic processes to ensure the freedom and well-being of everyone in society.
Option 3: Green - T.H. Green was a British philosopher who focused on individual freedom and social cooperation. However, he did not specifically state that liberty consists in obedience to the general will.
Option 4: Laski - Harold Laski was a British political scientist and economist, but he did not make the statement that liberty consists in obedience to the general will.
In conclusion, the correct answer is option 2, Rousseau.