Which one of the following curves represents the variation of impedance (Z) with frequency f in series LCR circuit

Z=R2+2πfL−12πfC2From above equation at f = 0 ⇒z=∞When f=12πLC (resonant frequency)  ⇒Z=RFor f>12πLC⇒ Z starts increasing.i.e., for frequency 0 – fr, Z decreasesand for fr to ∞, Z increases. This is justified by graph 3.