With which country India signed a landmark defence cooperation pact, the first of its kind between the two nations in April 2025?

Sri Lanka

The correct answer is option 4: Sri Lanka

India and Sri Lanka took a historic step in strengthening their bilateral relations by signing a landmark defence cooperation pact, the first of its kind between the two nations in April 2025. This comes almost 40 years after the deployment of the Indian Peace Keeping Force (IPKF) in Sri Lanka during the civil conflict.