You have an Azure Active Directory (Azure AD) tenant that contains the objects shown in the following table. 

Which objects can you add as members to Group3? 

Answer options:

A. User2 and Group2 only
B. User2, Group1, and Group2 only
C. User1, User2, Group1 and Group2
D. User1 and User2 only
E. User2 only

E

Reference: https://bitsizedbytes.wordpress.com/2018/12/10/distribution-security-and-office-365-groups-nesting/