Explanation:

- Section 145: This section deals with enforcing a decree against sureties. It allows a decree holder to execute a decree against a surety who has undertaken the obligation.

- Section 158: This section addresses the repeal of the earlier Code of Civil Procedure and the effects of such repeal. It ensures the continuity of legal proceedings and rights established under the repealed acts.

Correct Answer: Section 158

- Section 148: Covers the power to enlarge time. It allows the court to extend deadlines for actions required under the procedural rules.

- Section 15: Discusses institutions of suits and the appropriate jurisdiction for filing cases, emphasizing that cases should be filed in the court of the lowest grade competent to try it.