Explanation:

- Section 60: It mandates that oral evidence must be direct, meaning witnesses should testify to what they've personally seen, heard, or perceived.

- Section 64: This section requires that documents must be proved by primary evidence except in certain circumstances.

- Section 91: It emphasizes that written documents must be proved by producing the original document, aligning with the best evidence rule.

- Option 4: All of them: All these sections collectively embody the principle that the best available evidence should be presented in court.

Correct Answer: Option 4 - All of them

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