Q. Consider the following pairs:
Space-based augmentation systemsCountries
1.GAGANIndia
2.WAASUSA
3.EGNOSJapan
4.MSASChina
How many of the above pairs are correctly matched?
Answer: B
Notes:
Explanation: Pairs 1 and 2 are matched correctly
- Only four Space-Based augmentation systems are available in the world namely India (GAGAN), US (WAAS) Europe (EGNOS) and Japan (MSAS).

