Given below in the left column are different modes of communication using the kinds of waves given in the right column.
`{:(A. "Opticla Fibre Communication",P. "Ultrasound"),(B."Rader",Q."Infrarad Light"),(C."Sonar",R."Microwaves"),(D."Mobile Phones",S."Radio Waves"):} `
From the options given below, find the most appropriate match between entries in the left and the right column.

Options

A. A-Q,B-S,C-R,D-P
B. A-S,B-Q,C-R,D-P
C. A-Q,B-S,C-P,D-R
D. A-R,B-P,C-S,D-Q

Answer

To solve the problem of matching modes of communication with their corresponding types of waves, we can analyze each mode of communication and identify the wave type associated with it.

### Step-by-Step Solution:

1. **Optical Fibre Communication (A)**:
- Optical fibre communication primarily uses light waves for transmitting data. The type of light used in optical fibres is typically infrared light.
- **Match**: A → Q (Infrared Light)

2. **Radar (B)**:
- Radar technology uses radio waves to detect objects and measure their distance. It sends out radio waves and analyzes the reflected signals.
- **Match**: B → S (Radio Waves)

3. **Sonar (C)**:
- Sonar (Sound Navigation and Ranging) uses sound waves, specifically ultrasound, to detect objects underwater. It emits sound waves and listens for echoes.
- **Match**: C → P (Ultrasound)

4. **Mobile Phones (D)**:
- Mobile phones communicate using electromagnetic waves, primarily in the microwave range for transmitting signals over distances.
- **Match**: D → R (Microwaves)

### Summary of Matches:
- A → Q (Optical Fibre Communication → Infrared Light)
- B → S (Radar → Radio Waves)
- C → P (Sonar → Ultrasound)
- D → R (Mobile Phones → Microwaves)

### Final Answer:
The most appropriate matches are:
- A with Q
- B with S
- C with P
- D with R