Answer :

The most liquid type of bank account among the options provided is the basic checking account.

1) Basic Checking Account:
- A basic checking account allows for easy access to funds through various means such as checks, debit cards, online transfers, and ATMs.
- These accounts typically have no limits on the number of withdrawals or transactions that can be made.
- Funds in a basic checking account are readily available for daily expenses and emergencies, making it highly liquid.

Therefore, in the context of liquidity (how quickly and easily assets can be converted into cash without significantly impacting their value), the basic checking account is the most liquid type of bank account among the options given.