You have an Azure Active Directory (Azure AD) tenant named contosocloud.onmicrosoft.com. Your company has a public DNS zone for contoso.com.
You add contoso.com as a custom domain name to Azure AD. You need to ensure that Azure can verify the domain name.
Which type of DNS record should you create?
A . PTR
B . MX
C . NSEC3
D . RRSIG
Answer: B