The following OmniStudio tools should be recommended to generate the prefilled PDF:
OmniStudio Action Document Generation, which is a tool that allows users to create documents from templates and data sources using OmniScripts and Integration Procedures. By using OmniStudio Action Document Generation, the consultant can create a document template with placeholders for the contact and address information and generate a PDF file from it using an OmniScript.
DataRaptor, which is a tool that allows users to extract and transform data from Salesforce or external systems using Integration Procedures. By using DataRaptor, the consultant can create a data source that retrieves the contact and address information from Salesforce and maps it to the document template placeholders.

Explanation
Salesforce offers various tools and capabilities to integrate Financial Services Cloud with external systems, such as core banking, insurance, or mortgage platforms. Some of the tools and capabilities that a consultant can recommend are:
Industry Integration Solutions with the MuleSoft Anypoint Platform: These are prebuilt integration solutions that leverage the MuleSoft Anypoint Platform to connect Financial Services Cloud with common industry systems, such as Fiserv, FIS, Jack Henry, and Guidewire1. These solutions enable bi-directional data synchronization, orchestration, and transformation between Salesforce and the external systems2.
OmniStudio Integration Procedures: These are reusable components that define the logic and sequence of steps for integrating data from external sources into Financial Services Cloud3. Integration procedures can be triggered by events, such as a button click or a record update, and can invoke other components, such as DataRaptors or OmniScripts4.
OmniStudio DataRaptors: These are data transformation components that can extract, load, and manipulate data from various sources, such as Salesforce objects, REST or SOAP web services, or CSV files5. DataRaptors can be used to map data between different formats, perform calculations or validations, or create or update records in Financial Services Cloud6.
References:
Industry Integration Solutions
MuleSoft Anypoint Platform
OmniStudio Integration Procedures
Create an Integration Procedure
OmniStudio DataRaptors
Create a DataRaptor

Explanation
The following statements are correct about the Actionable Relationship Center Manager (ARC):
To enable users to see the ARC, you will need to add the component for ARC to the page layout. The ARC is a Lightning component that can be added to any Lightning page that supports components, such as record pages, app pages, or Home pages. You can use the Lightning App Builder to drag and drop the ARC component to the desired location on the page layout.
ARC displays up to 5 related lists that have a configured compact layout. The ARC shows a graphical representation of the account-account relationships for a selected record, as well as related lists of other records that are associated with the account, such as contacts, financial accounts, or opportunities. The ARC can display up to 5 related lists at a time, and each related list must have a compact layout configured to show relevant fields.
The Association Type picklist controls the account-account relationship that display in the ARC. The Association Type picklist is a field on the Account Relationship object that defines the type of relationship between two accounts, such as Household Member, Business Owner, Trustee, or Friend.
The ARC uses this field to filter and display the account-account relationships for a selected record. You can customize this picklist to add or remove values according to your business needs. Verified References: : Salesforce Help Article 3 : Salesforce Help Article 4 : Salesforce Help Article 5