A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is

A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in serie

1.	A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is
A.	1,616 Ω
B.	161 Ω
C.	3,387 Ω
D.	1,771 Ω
Answer» B. 161 Ω