Which one of the following South American nation is a member of OPEC?

Venezuela

The correct answer is Option (2) → Venezuela

OPEC (Organization of the Petroleum Exporting Countries): Algeria, Indonesia, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, U.A.E. and Venezuela

Venezuela is the South American nation that is a member of OPEC. Venezuela is a significant member of OPEC because it has one of the largest oil reserves in the world and is a major oil producer.