The correct answer is option 2: Zero hour. In the Indian parliament, the Zero hour is an innovative discussion process that has been introduced. During the Zero hour, members of parliament can raise issues of national importance even if they are not listed in the business of the day. This provides an opportunity for MPs to seek clarifications from the government and bring attention to pressing matters. The Zero hour typically takes place at 12 noon in the Lok Sabha and 2 pm in the Rajya Sabha. It allows for spontaneous discussions on urgent matters, giving MPs a chance to voice their concerns and address pressing issues that may require immediate attention. This process has been recognized as a unique feature of the Indian parliamentary system.