Which one of the following countries has its own Satellite Navigation System?

GAGAN and NavIC are named examples showing that countries (here India) develop dedicated satellite-based augmentation or autonomous regional navigation systems.

A student could use this pattern — that countries with active national space/navigation projects announce named systems — and check whether Australia has any similarly named national GNSS or augmentation project.

Listing of specific launches (e.g., IRNSS-1A, IRNSS-11) shows that a national navigation system is implemented via launched navigation satellites.

Compare this to Australian launch/mission records or official satellite catalogs to see if Australia has launched or operates satellites identified as a national navigation constellation.

Description of India's IRS and its national remote sensing infrastructure illustrates that countries with domestic satellite systems develop and operate their own satellite networks and ground centres.

A student could check whether Australia operates an analogous domestic satellite network plus ground control infrastructure specifically for positioning/navigation.

General statement that artificial satellites are used for navigation (among other functions) highlights navigation as a common satellite application that nations may support via dedicated systems.

Use this to reason that if Australia lacked an explicit national GNSS, it might instead rely on international GNSS services (GPS, Galileo, etc.); the student could check Australian policy/technical sources for reliance versus a domestic system.

Notes that satellite communication and space research were pioneered by specific countries implies only some nations create full-fledged space/navigation systems.

A student can infer that presence of pioneers or an active space program correlates with having national satellite capabilities, and can verify where Australia sits among such countries to judge likelihood of a domestic GNSS.