Assertion (A): A capacitor with imperfect dielectric can be represented by a capacitance in parallel with resistance. Reason (R): For imperfect dielectrics, dielectric constant has real and imaginary parts.

• Both A and R are true and R is correct explanation of A
• Both A and R are true but R is not correct explanation of A
• A is true but R is false
• A is false but R is true