Problem Solve about Resistance

Problem Solve about Resitance.

An appliance draws 4 A of current when connected to 120 V. What  is the resistance of the appliance?
A. 0,03
B. 30
C. 124
D. 480

Solve :
\begin{aligned}
V &=I\cdot R \\
120 &= 4\cdot R \\
R &= \frac{120}{4} \\
&=30 \Omega
\end{aligned}

Answer : B