c
(C)  \(\,\,\frac{{{{\text{v}}_{{\text{min}}}}(L)}}{{{v_{\min }}(B)}}\,\, = \,\,\frac{C}{{\frac{{{\lambda _{\max }}(L)}}{{{\lambda _{\max }}(B)}}}}\,\, = \,\,\frac{{{\lambda _{\max }}(B)}}{{{\lambda _{\max }}(L)}}\,\,\,\)

\(= \,\,\,\,\frac{{\frac{1}{{R{Z^2}}}\left( {\frac{{4 \times 9}}{5}} \right)}}{{\frac{1}{{R{Z^2}}}\left( {\frac{{1 \times 4}}{3}} \right)}}\,\, = \,\,\frac{{4 \times 9}}{5} \times \frac{3}{4} = \frac{{27}}{5} = 5.4\)