Defendant may apply for setting aside ex-parte decree under the Civil Procedure Code :

The correct answer is (a) Order 7 Rule 13.

Order 7 Rule 13 of the Civil Procedure Code provides for the setting aside of ex parte decrees. An ex parte decree is a decree that is passed without the defendant being present in court. The defendant may apply to have the decree set aside if they can show that they had a good reason for not being present in court, and that they would have been able to defend the case if they had been present.

Order 9 Rule 13 deals with the service of summons. Order 8 Rule 13 deals with the filing of the plaint. Order 11 Rule 13 deals with the taking of evidence.

I hope this helps!