The primary bank account is the main bank account that will be linked to your 5Paisa account. While opening a trading and demat account, you are supposed to submit the details of a bank account with 5Paisa. This bank account is treated as the primary bank account and is used to deposit and withdraw money from your trading account.
Additional to the primary account is the secondary account, which can also be added to your trading account. However, this secondary account can only be used to deposit funds in your trading account, and no withdrawal requests can be completed through it.
Important note: You can add multiple bank accounts to your 5Paisa account, but only one of them can be the primary bank account.