Match the List-I with List-II:

Choose the correct answer from the options given below:

Microwaves are generated by specialized vacuum tubes like a Klystron valve or magnetron.

Gamma rays originate from high-energy nuclear transitions during the Radioactive decay of the nucleus.

Radio waves are produced by the Rapid acceleration and deceleration of electron in aerials or antennas.

X-rays are produced when high-energy electrons strike a target, exciting Inner shell electrons or via bremsstrahlung.

Answer: A-IV, B-I, C-II, D-III