If you can show the funds in a single account that is over the cut off limit then that will do. Else you can add more accounts as well, its not mandatory to showcase all/more than one account for PoF purpose.
If you choose the account balance to show from the account which has a related outstanding loan then CIC may consider the remaining amount (total amount in your account - outstanding loan amount) and that remaining amount should be more than the cut off limit as applicable to your application. Further, in case the resulting amount is lower or negative (in some cases it could be negative) then it is advisable to use the account where the balance amount is more than the cut off limit (with or without any outstanding loan).
