Which of the foll A. R = 20 Ω, L = 1.5 H, C = 35μF.

B. R = 25 Ω, L = 2.5 H, C = 45μF.

C. R = 15 Ω, L = 3.5 H, C = 30μF.

D. R = 25 Ω, L = 1.5 H, C = 45μF.

The quality factor is given by:

For good communication, quality factor has to me more. The quality factor varies directly with root of inductance(L), inversely with root of capacitance (C) and inversely with resistance (R). The resistance and capacitance are minimum in (c). Also, the inductance is maximum in (c). Hence, without any calculation, we can conclude that Quality factor is highest for (c)