The driving point impedance Z(s) for the circuit shown below

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The driving point impedance Z(s) for the circuit shown below is

1. s⁴ + 3s² + 1
  s³ + 2s
2. s⁴ + 2s² + 4
  s³ + 2s
3. s² + 1
  s⁴ + s² + 1
4. s³ + 1
  s⁴ + s² + 1

Correct Option: A

S- Domain representation of the given circuit

Z(s) = s +	1		s +	1
	s			s

	1	+		s +	1
	s				s

Z(s) =	s⁴ + 3s² + 1
	s³ + 2s