Arrange the following events related to the linguistic reorganisation of States in the correct chronological order.

A. The Indian National Congress reorganised its provincial units on linguistic lines.

B. India attained Independence and Partition took place.

C. The States Reorganisation Commission (SRC) was implemented.

D. The Indian Constitution came into force.

A → B → D → C

The correct answer is option 1: A → B → D → C. 

• A occurred first when the Indian National Congress reorganised its provincial units on linguistic lines during the 1920s.
• B followed with India's Independence and Partition in 1947.
• D came next with the adoption of the Constitution in 1950.
• C occurred last when the recommendations of the States Reorganisation Commission were implemented on 1 November 1956.