What is the open circuit impedance Z11(s) of the network shown in the figure given below?

A. $$10 + 2{\text{s}}$$
B. $$\left( {10 - \frac{4}{{\text{s}}}} \right)$$
C. $$\left( {10 + \frac{4}{{\text{s}}}} \right)$$
D. $$10 - 2{\text{s}}$$
Answer: Option C

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