Explanation:

- Section 91 of Cr PC: Allows court or officer in charge of a police station to summon a person to produce documents or other things necessary for investigation or proceeding.

- Complainant:

- Can be summoned to produce evidence.

- Accused:

- Generally, Section 91 does not apply here.

- Cannot be compelled to produce documents that may incriminate themselves (Article 20(3) of Indian Constitution offers protection).

- Witness:

- Can be summoned under Section 91 to provide evidence or documents.

- Persons Neither Complainant, Accused, nor Witness:

- Can also be summoned if possession of relevant documents is proven.

- Correct Answer: Option 2 - The accused

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