The correct answer is option 4, 1940. In 1940, the Muslim League passed the Lahore Resolution which called for the creation of a separate Muslim-majority nation in British India. This resolution was a response to the Indian National Congress`s demand for a unified and independent India. The resolution stated that the areas in which Muslims were in majority should form independent states. This marked a significant turning point in the demand for a separate nation for Muslims and laid the foundation for the eventual creation of Pakistan in 1947. It is important to note that prior to 1940, the Muslim League had advocated for a more inclusive and united India, but the failure of negotiations with the Congress and the growing communal tensions led to the adoption of the Lahore Resolution.