SawaalBoxसवाल बॉक्स

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 ?

  1. (a)1 and 2 only
  2. (b)3 and 4 only
  3. (c)1, 2 and 4 only
  4. (d)1, 2, 3 and 4
Show answerHide answer

Official answer(d) 1, 2, 3 and 4