Match List-I with List-II

List-I	List-II
(a) UV rays	(i) Diagnostic tool in medicine
(b) X-rays	(ii) Water purification
(c) Microwave	(iii) Communication, Radar
(d) Infrared wave	(iv) Improving visibility in foggy days

Choose the correct answer from the options given below :

We need to match each type of electromagnetic wave with its primary application.

(a) UV rays → (ii) Water purification: Ultraviolet rays are widely used for sterilisation and water purification, as they can kill bacteria and other microorganisms.

(b) X-rays → (i) Diagnostic tool in medicine: X-rays are extensively used in medical imaging (radiography, CT scans) to examine bones, teeth, and internal organs.

(c) Microwave → (iii) Communication, Radar: Microwaves are used in radar systems, satellite communication, and mobile phone networks due to their ability to travel long distances and penetrate the atmosphere.

(d) Infrared wave → (iv) Improving visibility in foggy days: Infrared waves can penetrate fog and haze better than visible light, which is why infrared cameras and sensors are used to improve visibility in poor weather conditions.

The correct matching is (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv). Hence, the correct answer is Option B.