The Kesavananda Bharati vs State of India case is considered a landmark judgement of the Supreme Court of India because it established an important constitutional principle. Option 3 correctly states that the judgement declared that the basic structures of the Constitution, as defined in the Preamble, cannot be changed. This means that the fundamental framework and principles of the Constitution cannot be altered or amended in a way that would change the fundamental character of the Indian Constitution.

Option 1, stating that the case established the principle that religion cannot be mobilized for political ends, is not correct. This is not the core issue addressed in the Kesavananda Bharati case.

Option 2, mentioning the abolition of untouchability, is irrelevant to the Kesavananda Bharati case, as it does not pertain to the case.

Option 4, stating that the case established that the right to life and liberty cannot be suspended under any circumstance, is also not correct. The case did not revolve around the issue of the suspension of rights.

In conclusion, option 3 accurately describes the landmark judgement of the Kesavananda Bharati vs State of India case, which is the recognition that the basic structures of the Constitution cannot be changed.