A `100 V` a.c. source of frequency `500 Hz` is connected to a `LCR` circuit with `L = 8.1` millihenry, `C = 12.5 mu F` and `R = 10` ohm, all connected in series. What is the potential difference across the resistance?
A. 25 V
B. 50 V
C. 75 V
D. 100 V