Which of the following combinations should be selected for better tuning of an L-C-R circuit used for communication?

(a) R = 20 ?, L = 1.5 H, C = 35μF

(b) R = 25 ?, L = 2.5 H, C = 45 μF

(c) R=15?, L = 3.5H, C = 30 μF

(d) R = 25 ?, L = 1.5 H, C = 45 μF

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