A. Gamma ray
B. Radio wave
C. Infrared ray
D. X-ray
Correct Answer: Option B
B. Radio wave
Explanation
Radio wave has the longest wavelength and shortest frequency.
A. Gamma ray
B. Radio wave
C. Infrared ray
D. X-ray
Correct Answer: Option B
B. Radio wave
Explanation
Radio wave has the longest wavelength and shortest frequency.
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