Explanation:

In July 2019, the BSF launched a specific operation to enhance the security along the Pakistan border in Punjab and Jammu. Let's explore the options provided:

- Option 1: Chakravyuh

- This name is often associated with intricate military tactics, but it was not used by the BSF for this operation.

- Option 2: Garuda

- Garuda typically symbolizes speed and striking power, yet this was not the operation in question.

- Option 3: Vayuputra

- Vayuputra is related to Hindu mythological references and was not used here.

- Option 4: Sudarshan

- This is the correct answer. In July 2019, the BSF launched Operation Sudarshan to fortify the India-Pakistan border in Punjab and Jammu.

Operation Sudarshan was critical for tightening security and addressing cross-border threats in the region.