Solution:

• A tank circuit is an electrical circuit consisting of a capacitor connected to an inductor, by conducting wires that use magnetic resonance to store electrical energy oscillating at a certain resonating frequency.
• It is used to produce electric oscillations of any desired frequency.
• Dynamic impedance is the impedance offered at resonance.
• A tank circuit is a parallel LC circuit. So dynamic impedance is infinite as at resonance the circuit become open circuit.
• For ideal tank circuit R value is zero. Therefore dynamic impedance is infinite and dynamic admittance is zero.