Q. Which of the following is/are Space based augmentation system/s?
1.GAGAN
2.EGNOS
3.WAAS
Choose the correct answer from below given codes:

[A] 1 only

[B] 1 and 2 only

[C] 2 and 3 only

[D] 1, 2 and 3

Answer: D
Notes:

Explanation: GAGAN is an Indian Satellite Based Augmentation System (SBAS) jointly developed by AAI and ISRO for India and neighboring countries in the equatorial region.

It is one among the only four Space-Based augmentation systems available in the world which also includes US (WAAS) Europe (EGNOS) and Japan (MSAS).

Source: FORUMIAS