Yes, you can deposit BUSD to an exchange and have it automatically converted into USDC 1:1. This is because BUSD is a stablecoin pegged to the US Dollar, meaning that 1 BUSD is always equal to 1 USD. The exchange will recognize this and automatically convert your BUSD into USDC at a 1:1 ratio. This is a great way to quickly and easily convert your BUSD into USDC with no additional fees or costs.