Q: In which one of the following regions of electromagnetic spectrum, LASER is most difficult to achieve?
(a)Microwave
(b)Infrared
(c)Visible
(d)Ultraviolet
Correct Answer: (c)
The correct answer is (c): Visible. Subject: Science & Technology | Sub-topic: Physics Note: This answer was determined through AI-based research. Verify against the official answer key when available.