Concept:Effective and responsible parenthood is a civic obligation that contributes to nation-building.
Explanation:Responsible parenthood means parents must care for, guide, and provide for their children.
This includes giving moral training and helping children acquire good values.
When children become disciplined and useful citizens, the entire nation benefits.
Such parenting ensures peace, progress, and sustainable development in society.
Unlike military, political, or economic duties, this role is not limited to a specific group or office.
It is a duty performed by every parent for the good of the country.
Hence, it is primarily a national responsibility.
Answer:A. a national duty