Explanation:

Section 21 of the Code of Civil Procedure (CPC) deals with objection to jurisdiction. Here's a breakdown of the options:

- Option 1: Want of subject-matter jurisdiction

- Typically, objections based on subject-matter jurisdiction can be raised at any stage.

- Option 2: Want of pecuniary jurisdiction

- Addresses jurisdiction based on monetary limits. If not challenged at the earliest opportunity, defects are generally deemed cured.

- Option 3: Want of territorial jurisdiction

- Concerns the geographic area of jurisdiction. Like pecuniary jurisdiction, failure to object early can lead to the waiver of this defect.

- Option 4: Both (b) and (c)

- Ensures that only pecuniary and territorial jurisdiction issues can be cured if not raised timely.

Correct Answer: Option 4 - both (b) and (c).