Consider the following:
1. Ultra Mobile Broadband (UMB)
2. Mobile Broadband Wireless Access (MBWA)
3. iBurst
4. Orthogonal frequency-division multiplexing (OFDM)
Which of the above is / are 4G technologies?

Answer: [D] 1, 2, 3 & 4

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