One of these is NOT a purpose for the establishment of public corporation

Analyze the question: We need the option that is NOT a reason for setting up a public corporation (a government-owned body such as NNPC, NEPA/PHCN, or the Nigerian Ports Authority).

Concept: Public corporations are established by an Act or Decree of government to:

• Provide essential services (water, electricity, transport) that private firms may not provide, or would provide at high cost.
• Undertake projects needing huge capital that private individuals cannot raise (capital involvement).
• Promote economic growth and development (economic growth).
• Keep the prices of essential goods and services low (reduce cost).
• Protect strategic or sensitive sectors such as defence, ammunition, and mint/currency production (security reasons).
• Prevent private monopoly and exploitation of consumers.

Step-by-step evaluation:

• A. Capital involvement: This is valid. Government can mobilise the large capital needed for heavy industries.
• B. Compete with private enterprise: This is not valid. Public corporations are not set up to compete with private business. They exist to provide services in the public interest, and often fill gaps that private enterprise cannot or will not fill, or run as monopolies.
• C. Economic growth for the country: This is valid.
• D. Reduce cost: This is valid, because the goal is affordable services for citizens.
• E. Security reasons: This is valid, as with the Defence Industries Corporation of Nigeria.

Tip: For "NOT" questions, ask what the corporation is meant to do: serve the public, not make profit or compete. Any option that sounds like pure profit-seeking or rivalry with private business is usually the odd one out.