The 'basic structure' theory of the Constitution of India is implied from
1
Certain features of the Constitution are so essential to it that they cannot be abrogated.
2
Fundamental rights cannot be abridged or taken away.
3
The Constitution cannot be amended except in accordance with the procedure prescribed in Article 368.
4
The Preamble cannot be amended for it is not a part of the Constitution.
5
None of the above/More than one of the above.