Final answer:
In a series-parallel circuit, if the series portion becomes inoperative, the other circuits will not be affected.
Step-by-step explanation:
In a series-parallel circuit, the correct statement is option d) If the series portion becomes inoperative, the other circuits will not be affected. In a series-parallel circuit, if the series portion becomes inoperative, the other circuits will not be affected. In a series-parallel circuit, the components are arranged in both series and parallel connections.
If the series portion becomes inoperative, it means that a component in the series part is not working, but the other circuits that are connected in parallel will still remain functional. This is because in a parallel connection, each component has its own separate path for current flow, so the failure of one component does not affect the others.