The question describes a balanced delta connected system. In a balanced delta connection, the line voltage is equal to the phase voltage, and the line current is related to the phase current by a fact

The question describes a balanced delta connected system. In a balanced delta connection, the line voltage is equal to the phase voltage, and the line current is related to the phase current by a factor of $\sqrt{3}$.

For a balanced delta connected system, the line current ($I_L$) is $\sqrt{3}$ times the phase current ($I_{\text{phase}}$).

This relationship matches option C.

The line current in a balanced delta connected system is $\text{C. } \sqrt{3} I_{\text{phase}}$.