Explanation:

• Option B is correct: In 1942, Churchill dispatched Minister Sir Stafford Cripps to India for negotiations with Gandhiji and the Congress.
• However, discussions collapsed when the Congress insisted that an Indian Defence Member needs to be appointed by the Viceroy before assisting Britain against the Axis powers. In 1945, a Labour government came to power in Britain and committed itself to granting independence to India.
• Meanwhile, back in India, the Viceroy, Lord Wavell, brought the Congress and the League together for a series of talks. In early 1946, provincial elections were conducted, where the Congress emerged victorious in the "General" category. Conversely, the League secured a significant majority in seats designated for Muslims.
• This outcome marked the culmination of political polarisation. Subsequently, a Cabinet Mission dispatched during the summer of 1946 aimed to broker an agreement between the Congress and the League on a federal system ensuring unity while granting provincial autonomy. Regrettably, this mission did not achieve consensus between the two parties.