c
In steady state, inductor behaves as a conducting wire.

So, equivalent circuit becomes

\(\frac{1}{{R}_{{eq}}}=\frac{1}{3}+\frac{1}{3}+\frac{1}{3}=1\)

\(\Rightarrow {R}_{{eq}}=1\, \Omega\)

\(\Rightarrow\) Circuit becomes

\(\Rightarrow {i}=\frac{30}{3}=10\, {A}\)