Explanation:

- Option 1: Question Hour

- ?? Correct Answer: The Parliament session traditionally begins with Question Hour. Members of Parliament ask questions from the ministers, who are obliged to answer.

- Option 2: Recess

- The break or interval during a parliamentary session. It is not a formal sitting time and doesn’t begin a session.

- Option 3: Calling Attention Motion

- A method where members draw attention to urgent public issues. This is not the starting point of a session.

- Option 4: Zero Hour

- A time immediately following Question Hour. Members raise matters without prior notice. It is not the beginning of a session.