Which of the following are examples of electromagnetic waves?
1. X-rays 2. Ultrasonic
3. β-rays 4. α-rays
A
1 only
B
3 only
C
1, 3 and 4
D
2, 3 and 4
Correct Option:
A
Explanation
X-rays are electromagnetic waves. Ultrasonic waves are mechanical sound waves, while alpha and beta radiation consist of particles. Therefore, only statement 1 is correct.
