Explanation:

- Option 1: PayPal

- PayPal announced it planned to wind down its domestic payment services in India from April 01, 2021.

- It focuses on expanding cross-border payments instead.

- Option 2: Paydiant

- A mobile wallet platform acquired by PayPal in 2015.

- Primarily involved in white-label mobile payment solution for retailers.

- Option 3: Visa Checkout

- A service by Visa offering a streamlined checkout experience for consumers.

- Not specifically tied to any Indian market announcement in this context.

- Option 4: Apple Pay

- A mobile payment service by Apple mainly available in certain regions, but no announcement about winding down services in India.

- Option 5: Square Order

- This service was an ordering app that allowed consumers to place orders for pickup.

- The service shut down in 2015, so not relevant to the 2021 context.

- Correct Answer: Option 1 - PayPal