Explanation:

- When a plaintiff is ordered by the court to furnish security for payment of costs and fails to do so, the court has some discretion in how to proceed.

- Option 1 (stayed): The suit may be stayed, meaning it is put on hold until the order is complied with.

- Option 2 (dismissed): The court may dismiss the suit for non-compliance.

- Option 3 (rejected): The plaint may also be rejected in some situations.

- Option 4 (either (a) or (b) or (c) in the discretion of the court): This recognizes the court’s discretion to take any of the listed actions.

Correct Answer:

Option 4 – either (a) or (b) or (c) in the discretion of the court.

The court can either stay, dismiss, or reject the plaint based on the circumstances.