How is the name of the IP address 198.51.100.165 stored on a DNS server?

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Reverse DNS assigns hostnames to IP addresses.

How is the name of the IP address 198.51.100.165 stored on a DNS server?
A . In the A record for 165.100.51.198.ipv4.arpa.
B . In the PTR record for 165.100.51.198.in-addr.arpa.
C . In the RNAME record for 198-51-100-165.rev.arpa.
D . In the ARPA record for 165.100.51.198.rev.
E . In the REV record for arpa.in-addr.198.51.100.165.

Answer: B