Explanation:

- Option 1: Primary evidence

- Refers to the original document or thing itself.

- Considered more credible in legal proceedings.

- Option 2: Secondary evidence

- Refers to copies or substitutes for the original document.

- Used when primary evidence is unavailable.

- Option 3: Electronic record

- Refers to digital or electronic documents.

- Covered under Section 65A, which deals with the admissibility of electronic records as evidence.

- Correct Answer

- Option 4: Oral evidence

- Refers to spoken testimony given by witnesses.

- Provided by individuals who have directly observed the facts of a case.