The primary winding of an electric train transformer has 400 turns and the secondary has 50. If the input voltage is 120 V (rms) what is the output voltage?

The primary winding of an electric train transformer has 400 turns and the secondary has 50. If the input voltage is 120 V (rms) what is the output voltage?
A)15 V (rms)
B)30 V (rms)
C)60 V (rms)
D)2.4 V (rms)
E)960 V (rms)