What are the four existing Regional Internet Registry (RIR’s)?

A.
RIPE NCC, LACNIC, ARIN, APNIC

B.
RIPE NCC, NANIC, ARIN, APNIC

C.
RIPE NCC, ARIN, APNIC, LATNIC

D.
APNIC, PICNIC, ARIN, LACNIC

Explanation:
All other answers includenon existing organizations (PICNIC, NANIC, LATNIC). See http://www.arin.net/library/internet_info/ripe.html