Match List-I with List-II and select the correct answer using the options given below:

List-I	List-II
a. $$\frac{{{{\text{s}}^2} - {\text{s}} + 1}}{{{{\text{s}}^2} + {\text{s}} + 1}}$$	1. RL admittance
b. $$\frac{{{{\text{s}}^2} + {\text{s}} + 1}}{{{{\text{s}}^2} - {\text{s}} + 1}}$$	2. RL impedance
c. $$\frac{{{{\text{s}}^2} + 4{\text{s}} + 3}}{{{{\text{s}}^2} + 6{\text{s}} + 8}}$$	3. Unstable
	4. Non- minimum phase