Exam ADM-201 topic 1 question 120 discussion

I am not sure this answer is correct. Check out this https://success.salesforce.com/answers?id=90630000000gubqAAA.

yep If you go through the journey of adding a lookup relationship then you will see that you can add all objects in the field relationship

In Salesforce, a custom lookup field can be used to create a relationship between a standard object (like Leads, Accounts, or Contacts) and another object, which can include custom objects. So, the custom lookup field can be used to link standard objects (like Leads, Accounts, and Contacts) to other standard or custom objects (such as custom objects). Here's a breakdown: You can create lookup relationships between standard objects (like Accounts, Contacts, and Leads) and custom objects. You can also create a lookup relationship between standard objects and other standard objects (to some extent), but in the case of things like Users, Campaigns, and Contracts, those usually have their own predefined relationships or different field types for linking them.

A is correct, B is wrong because it is possible to create a relationship to User and custom objects from Standard objects

A custom lookup field can create a relationship between a standard object and Leads, Accounts, Contacts, and Custom Objects

answer D is appearing to be convincing because it is lookup relation between standard vs custom objects , contract, and campaign

User Object can`t have ability to create lookup relationship with any Object. ONLY Available Hierarchical Relationship. So I thing maybe answer is not correct.

Answer is All objects.