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The value of the total impedance after replacing the inductor and capacitor is?

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The value of the total impedance after replacing the inductor and capacitor is?

(a) R-LS-1/CS

(b) R-LS+1/CS

(c) R+LS+1/CS

(d) R+LS-1/CS

This question was posed to me during an internship interview.

Question is from Series and Parallel Combination of Elements in portion S-Domain Analysis of Network Theory

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Right answer is (c) R+LS+1/CS

The explanation: The value of the total impedance after replacing the inductor and capacitor is Z (s) = R+LS+1/CS. By knowing the V(s) and Z(s) we can calculate I(s) as I(s) is given as the total transform voltage in the circuit divided by the total transform impedance.

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