The main phases of the Quit India Movement are represented by options 1, 2, and 4.

Option 1 includes strikes, boycotts, and picketing in urban centers. This was a key strategy used by the movement to create disruption and put pressure on the colonial authorities.

Option 2 involves widespread attacks in rural areas on symbols and means of colonial rule and authority, such as railways, telegraph lines, and government buildings. These attacks aimed to undermine the infrastructure of the colonial administration and highlight the resistance of the Indian people.

Option 4 references the `Karnataka method`, which was a specific strategy utilized in the Quit India Movement. This method involved the establishment of parallel governments and administration structures in certain regions, effectively challenging the authority of the British colonial government.

Therefore, the correct answer should be Option 3, as it includes all the main phases of the Quit India Movement.