After the First World War, the Triveni Sangh was formed by the Ahirs and Kurmis. The Triveni Sangh was a political organization that emerged in northern India, particularly in the United Provinces (now Uttar Pradesh), during the early 20th century.

Option 1: The Jats and Gujjars. This is not the correct answer. While Jats and Gujjars are both prominent communities in northern India, they were not the ones involved in the formation of the Triveni Sangh.

Option 2: The Rajputs and Yadavs. This is not the correct answer. Although Rajputs and Yadavs are also significant communities in India, they were not the ones responsible for the establishment of the Triveni Sangh.

Option 3: The Jats and Yadavs. This is also not the correct answer. While Jats and Yadavs are both influential communities in India, they were not the ones who formed the Triveni Sangh after the First World War.

Therefore, the correct answer is option 4: The Ahirs and Kurmis. The Ahirs and Kurmis, both agricultural communities in northern India, were the ones who joined forces to create the Triveni Sangh after the First