You cannot choose the CPF account to withdraw from. Your savings will be paid from your CPF accounts in the following order:

 

1. Retirement Account (if applicable)
2. Ordinary Account

 

Accounts with higher interest rates typically require you to lock in your savings for a longer period of time. This is similar to fixed deposits in the market, which also offer higher interest rates if savings are locked in for a set period, compared to savings deposits which are withdrawable anytime.