Concept:Public corporations are set up primarily to serve the public interest, not to earn profit.
Explanation:The main aim of establishing public corporations is to provide essential utility services such as water, electricity, and transport.
These services are offered to the public at minimal or subsidized costs.
Unlike private companies, public corporations do not exist to maximise profits for owners.
Therefore, making maximum profits, helping businessmen, or employing defeated politicians are not their core purposes.
Answer:D. provide utility services to the public at minimal cost