Polymorphic Lookup Fields:
These fields can reference multiple object types.
Example: TheWhatIdfield on Event can reference any object that is related to the Event, such as Account or Opportunity.
Why Not Other Options?
A:ParentIdon Account is not polymorphic; it only points to other Accounts.
B: Custom fields cannot be polymorphic.
D:LeadIdandContactIdare specific fields, not polymorphic.
[References:Polymorphic Lookups:https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/field_types.htm, , ]
Submit