How does the sign of the phase angle φ, by which the supply voltage leads the current in an LCR series circuit, change as the supply frequency is gradually increased from very low to very high values?

Options

1. AFrom positive to zero to negative; zero at resonant frequency
2. BFrom negative to zero to positive; zero at resonant frequency
3. CFrom zero to positive to negative; zero at resonant frequency
4. DFrom zero to negative to positive; zero at resonant frequency