Li-Fi (Light Fidelity):

  1. is a fast and cheap optical version of WiFi
  2. is based on LEDs for the transfer of data
  3. works only in direct line of sight

Which of the above statements is/are correct?

Answer: [D] 1, 2 & 3

All are correct statements. [More information is here]

This question is a part of GKToday's Integrated IAS General Studies Module