Final answer:
Irina, Ron, and Benz are likely to form a limited liability company (LLC) which fulfills their requirements of active management without personal liability for debts and avoiding regular board meetings.
Step-by-step explanation:
Irina, Ron, and Benz are looking to start a business designing interiors of offices, with active management roles but without personal liability for the company's debts and obligations. Given their requirements of not wanting to hold regular board meetings, they're most likely to form a limited liability company (LLC). An LLC provides the benefits of limiting their personal liability similarly to a corporation, but it is often simpler to operate and does not require regular board meetings, making it a flexible option for small businesses.