Explanation:

- Option 1: A rule of procedure

- Section 15 of the Code of Civil Procedure (CPC) specifies the court in which lawsuits should be initiated, guided by the pecuniary jurisdiction.

- It is primarily concerned with the procedure to be followed in filing a suit.

- Correct Answer

- Option 2: A rule of jurisdiction

- Though Section 15 involves courts and their competence, it primarily discusses procedural, not jurisdictional, aspects.

- Option 3: A rule of evidence

- This is unrelated as Section 15 does not pertain to rules governing the admissibility or handling of evidence.

- Option 4: All the above

- Incorrect as it doesn’t cover jurisdiction or evidence aspects.

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