Explanation:

- Option 1: Section 22 does not deal primarily with the objection as to place of suing. It relates more to provisions concerning certain cases where multiple parties can be involved.

- Option 2: Section 21A is not a relevant section concerning the objection as to place of suing. It often doesn't relate to civil procedural matters.

- Option 3: ? Section 21 primarily deals with objections related to jurisdiction, including the place of suing. It states that such objections should be raised at the earliest opportunity in the Court of first instance.

- Option 4: Section 20 deals with the general principle regarding the court's jurisdiction and does not specifically focus on objections about the place of suing.