Exp) Option d is the correct answer.

The Constitution of India has adopted the system of single citizenship. There is only Indian Citizenship and no separate state citizenship. All citizens irrespective of the state in which they are born or reside enjoy the same rights all over the country. The other federal states like US, Switzerland and Australia have dual citizenship, that is, national citizenship as well as state citizenship.

Option a is incorrect: The reason for providing single citizenship was not to provide continuity to federal provisions.

Option b is incorrect: The dual citizenship system may create the problem of discrimination, that is, a state may discriminate in favor of its citizens in matters like the right to vote, right to hold public offices, right to practice professions and so on. This problem is avoided in the system of single citizenship prevalent in India.

Option c is incorrect: The issue of financial resources required for separate Constitutions was not of much significance.

Option d is correct: In India, the Constitution of India has introduced the system of single citizenship and provided uniform rights for the people of India to promote the feeling of fraternity and unity among them and to build an integrated Indian nation. All citizens irrespective of the state in which they are born or reside enjoy the same political and civil rights of citizenship all over the country and no discrimination is made between them.