The question asks which of the given statements about Mahatma Gandhi`s actions on the eve of launching the Quit India Movement are correct.
Option 1 suggests Gandhi asked government servants to resign and soldiers to leave their posts. While Gandhi did promote non-violent resistance against British rule, he did not ask government servants or soldiers to abandon their roles. Hence, this option isn`t accurate.
Option 2 suggests that Gandhi asked soldiers to leave their posts and Princes to accept the sovereignty of the people. But, as discussed, Gandhi did not ask soldiers to abandon their posts. Therefore, this option is also incorrect.
Option 3 asserts that Gandhi asked Princes to accept the sovereignty of their own people. Gandhi did preach self-rule (Swaraj) and independence from British rule, which included urging the princely states towards their own people`s sovereignty. Thus, this option is correct.
Option 4 includes all three statements: Gandhi asking government servants to resign, soldiers to leave their posts, and princes to accept their people`s sovereignty. As discussed, the first two statements are incorrect, so this option is incorrect as well.
Therefore, the correct answer is option 3.