The correct option is ISO IEC 27050.

ISO IEC 27050 is the international standard series that provides guidance for electronic discovery processes and best practices. The standard covers legal hold, identification, preservation, collection, processing, review, and disclosure and it is intended to help align legal, IT, and security teams across jurisdictions.

NIST SP 800 53 focuses on security and privacy controls for federal information systems and organizations. It is a controls framework rather than a dedicated eDiscovery guideline so it does not provide the specific legal hold and review process guidance found in ISO IEC 27050.

PCI DSS is a security standard created by the payment card industry to protect cardholder data. It addresses controls for payment environments and not the procedures and workflows used for eDiscovery and legal review.

GDPR is an EU data protection regulation that governs how personal data is processed and protected. It influences how organizations must handle and retain personal data but it is a privacy regulation rather than a procedural standard for eDiscovery and legal hold, and it does not supply the detailed eDiscovery process guidance that ISO IEC 27050 provides.

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