What is the purpose of a PTR record?
A.
To provide name to IP resolution.
B.
To provide IP to name resolution.
C.
To direct email to a specific host.
D.
To provide additional host information.
E.
To direct clients to another nameserver.
Explanation:
See http://en.wikipedia.org/wiki/Reverse_DNS_lookup
A.
To provide name to IP resolution.
B – ERRO
to provide an IP address so you can get a name resolution. that’s reverse dns a.k.a PTR record
B. is correct