Consider the following : 1. Bluetooth device 2. Cordless phone 3. Microwave oven 4. Wi-Fi device Which of the above can operate between 2.4 and 2.5 GHz range of radio-frequency band ?
- (a)1 and 2 only
- (b)3 and 4 only
- (c)1, 2 and 4 only
- (d)1, 2, 3 and 4
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Official answer(d) 1, 2, 3 and 4