Since there are a lot of cash transactions and cheques issue in your savings account, there is nothing wrong with banks asking you for your income and transaction reason.
உங்க savings account-ல நிறைய cash transactions, cheques issue பண்றதுனால, banks உங்கள income-ஐயும் transaction-க்கான reason-ஐயும் கேக்கறதுல எந்த தப்பும் இல்லங்க.