Q: Which one of the following transmission media is/are used for the remote control communication for televisions, VCRs, and stereos etc.?
(a)Fiber optics
(b)Fiber cables
(c)The electromagnetic spectrum
(d)Unguided infrared and millimeter waves
Correct Answer: (d)
The correct answer is (c): The electromagnetic spectrum. Subject: Science & Technology | Sub-topic: Physics Note: This answer was determined through AI-based research. Verify against the official answer key when available.