In a series LCR circuit, obtain the conditions under which (i) the impedance of the circuit is minimum, and (ii) wattless current flows in the circuit:
A) (i) At resonance frequency, (ii) At resonance frequency
B) (i) At resonance frequency, (ii) At any frequency
C) (i) At any frequency, (ii) At resonance frequency
D) (i) At any frequency, (ii) At any frequency