Courtesy of www.MikeHolt.com. Based on the 2023 NEC.
Question: When LFNC is used, and equipment grounding is required, a separate _____ shall be installed in the conduit.
a) grounding conductor
b) expansion fitting
c) flexible nonmetallic connector
d) grounded conductor
See answer below.
Answer: a) grounding conductor
According to Sec. 356.60, "Where equipment grounding is required, a separate grounding conductor shall be installed in the conduit."
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About the Author

Mike Holt
Mike Holt is the owner of Mike Holt Enterprises (www.MikeHolt.com), one of the largest electrical publishers in the United States. He earned a master's degree in the Business Administration Program (MBA) from the University of Miami. He earned his reputation as a National Electrical Code (NEC) expert by working his way up through the electrical trade. Formally a construction editor for two different trade publications, Mike started his career as an apprentice electrician and eventually became a master electrician, an electrical inspector, a contractor, and an educator. Mike has taught more than 1,000 classes on 30 different electrical-related subjects — ranging from alarm installations to exam preparation and voltage drop calculations. He continues to produce seminars, videos, books, and online training for the trade as well as contribute monthly Code content to EC&M magazine.