Some devices and electromagnetic wave are given in column -1 and column-2, match the device with electromagnetic wave work
`[[Column-1,Column-2],["(A) Mobile" ,"(P) Microwave"],["(B) Sonar" ,"(Q) IR"],["(C) Radar" ,"(R) Radiowave" ],["(D) Optical Fiber" ,"(S) Ultrasound"]]`

Options

A. `(ArarrS);(BrarrQ);(CrarrP);(DrarrR)`
B. `(ArarrQ);(BrarrS);(CrarrP);(DrarrR)`
C. `(ArarrQ);(BrarrS);(CrarrR);(DrarrP)`
D. `(ArarrS);(BrarrQ);(CrarrR);(DrarrP)`

Answer

To solve the problem of matching devices with their corresponding electromagnetic waves, we will analyze each device and determine which electromagnetic wave it utilizes.

### Step-by-Step Solution:

1. **Identify the device: Mobile**
- Mobile phones are primarily used for communication. They operate using electromagnetic waves, specifically radio waves and infrared waves for different functionalities.
- **Match:** Mobile - (Q) Infrared (IR)

2. **Identify the device: Sonar**
- Sonar stands for Sound Navigation and Ranging. It is used to measure the depth of water and locate objects underwater by emitting sound waves.
- **Match:** Sonar - (S) Ultrasound

3. **Identify the device: Radar**
- Radar is used for detecting objects and measuring their distance and speed. It operates using microwaves.
- **Match:** Radar - (P) Microwave

4. **Identify the device: Optical Fiber**
- Optical fibers transmit data as light signals. They utilize visible light and infrared light for communication.
- **Match:** Optical Fiber - (R) Radiowave

### Final Matches:
- (A) Mobile - (Q) Infrared
- (B) Sonar - (S) Ultrasound
- (C) Radar - (P) Microwave
- (D) Optical Fiber - (R) Radiowave

### Conclusion:
The correct matching is:
- A → Q
- B → S
- C → P
- D → R

Thus, the answer is option B.