In case of a Y-connected ac generator, each phase voltage has a magnitude of 90 VRMS, what is the magnitude of each line voltage

In case of a Y-connected ac generator, each phase voltage has a magnitude of 90 VRMS, what is the magnitude of each line voltage

1. 0 V
2. 156 V
3. 298 V
4. 90 V

Correct answer: 2. 156 V