Match List-I with List-II

Choose the correct answer from the options given below.

(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

The correct answer is Option (4) → (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

• (A) Radio waves — (III) Produced by accelerating electrons in a circuit: Radio waves are generated by oscillating electric charges (electrons) in conducting wires, such as those found in radio transmitters and antennas.

• (B) X-rays — (IV) Emitted from heavy atoms: X-rays are produced when high-energy electrons strike a metal target (usually a heavy atom like tungsten). The sudden deceleration of electrons or the transitions of inner-shell electrons in these heavy atoms releases X-ray photons.

• (C) $\gamma$-radiation (Gamma) — (II) Originates from an atomic nucleus: Gamma rays are the highest energy EM waves and are emitted during radioactive decay or nuclear reactions as the nucleus transitions from an excited state to a lower energy state.

• (D) Infrared waves — (I) Vibration of atoms and molecules: Infrared radiation is often referred to as "heat waves." It is produced by the thermal motion and vibrations of atoms and molecules within a substance.