3.When some unidentified / unknown person / firm sends you mail in a trustworthy /lucrative way asking for sensitive banks and online payment information, this is a case of __?

Phishing is exactly this scenario - deceptive emails (or messages) appearing trustworthy to trick recipients into revealing sensitive information like bank details, passwords, or payment info. Spam is unsolicited bulk email, hacking is unauthorized access, vishing is phone-based, and simulation is not a standard security term.