The transfer function of the following polar plot is
1
\(G\left( s \right) = \frac{1}{{\left( {1 + s{T_1}} \right)\left( {1 + s{T_2}} \right)}}\)
2
\(G\left( s \right) = \frac{1}{{s\left( {1 + s{T_1}} \right)\left( {1 + s{T_2}} \right)}}\)
3
\(G\left( s \right) = \frac{1}{{\left( {1 + s{T_1}} \right)\left( {1 + s{T_2}} \right)\left( {1 + s{T_3}} \right)}}\)
4
\(G\left( s \right) = \frac{1}{{{s^2}\left( {1 + s{T_1}} \right)\left( {1 + s{T_2}} \right)}}\)