Which of the following combination should be selected for better tuning of an LCR circuit used for communication?

R = 10 Ω, L = 5.0 H, C = 25 μF

The correct answer is Option (3) → R = 10 Ω, L = 5.0 H, C = 25 μF

To achieve better toning in an LCR circuit, one need to consider quality factor (Q) -

$Q=\frac{1}{R}\sqrt{\frac{L}{C}}$ 

$Q=\frac{1}{10}\sqrt{\frac{5}{25×10^{-6}}}$

Upon calculating quality factor for option 3, we deduce that it is the highest.

Hence, R = 10 Ω, L = 5.0 H, C = 25 μF