With reference to the Adjournment Motion, consider the following statements.

1. It is introduced in the Parliament to draw the attention of the House to a definite matter of urgent public importance.

2. Rajya Sabha is permitted to make use of this device

3. The discussion on an adjournment motion should last for not less than two hours and thirty minutes.

4. It should not cover more than one matter.

Which of the statements given above is/are correct?