Concept:A good citizen has duties toward the nation, including readiness to serve it when the need arises.
Explanation:Citizenship involves both rights and responsibilities.
Rights include enjoying amenities and personal development.
Responsibilities include obeying laws, defending the constitution, and serving the country when required.
Among the options, having an international passport is a privilege, not a duty.
Enjoying amenities provided by government is a right or benefit.
Developing one's potentialities is personal growth, not a civic duty.
Therefore, serving the country when required is the correct responsibility.
Answer:C. serve the country when required.