In which of the following areas can GPS technology be used?<br/>1. Mobile phone operations<br/>2. Banking operations<br/>3. Controlling the power grids<br/><br/>Select the correct answer using the code given below:

1. Mobile phone operations — Correct. GPS is used in mobile phones for location-based services, navigation, emergency response and network functions like time synchronization in telecom systems.

2. Banking operations — Correct. Banking networks, ATMs and digital transactions rely on precise time-stamping; GPS provides accurate timing synchronization for such operations.

3. Controlling the power grids — Correct. Power grids use GPS timing for synchronization, monitoring and fault detection, especially in phasor measurement units (PMUs).

Therefore, all three areas can use GPS technology.