Indian Politics
Granville Austin has described the Directive principles and the fundamental rights as

The conscience of the Constitution
The heart of the Constitution
None of the listed here
The back bone of the Constitution

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Indian Politics
The meaning of Residuary Powers in constitution of India is-

Powers related to Internal Emergency
Powers related to International issues
Powers which are not included in Union, State, and Concurrent List
Power which can be exercised by Central and State Governments

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