Fundamental Duties were not part of the original Constitution but were added later based on global configurations. From which of the following constitutions was this feature derived?

Explanation

The Fundamental Duties incorporated in Part IV-A (Article 51-A) by the 42nd Amendment Act of 1976 were borrowed from the constitution of the former USSR (Soviet Union). This feature is structurally unique as most democratic western constitutions like the US do not explicitly contain duties.