Found 2 exchanges where USDC is traded for BNB. According to the data on 23 August the most optimal price to exchange USDC for BNB is BNB0.0014 for 1 USDC. This rate is fixed at OpenOcean at the maximum trading volume of the pair USDC/BNB - 235.5 BNB.
The maximum daily trading volume is observed in the USDC/USDT trading pair at Tapbit and reaches BNB 818 033.94 (12.22% of the exchange's total trading volumes) at the price BNB 0.0014 per 1 USDC.
The minimum price to buy USDC for BNB is 0.0014 - on the exchange OpenOcean.
The maximum price to buy USDC/BNB is 0.0014 - on the exchange Cetus.
Warning: some USDC markets show an abnormally wide spread — those quotes may be unreliable (thin liquidity or off-market trades). Cross-check the volume against several venues.