Step 1: Identify the year of judgment for each landmark case.
These cases are pivotal in the evolution of the 'Basic Structure Doctrine' of the Indian Constitution.
(d) Kesavananda Bharati v.
State of Kerala: The foundational case that established the Basic Structure Doctrine was decided in 1973.
(b) Minerva Mills v.
Union of India: This case further strengthened the doctrine by striking down clauses that gave Parliament unlimited amending power.
It was decided in 1980.
(a) Waman Rao v.
Union of India: This case clarified that the Basic Structure Doctrine would apply prospectively, i.
e.
, to all constitutional amendments made after the date of the Kesavananda Bharati judgment (April 24, 1973).
It was decided in 1981.
(c) I.
R.
Coelho v.
State of Tamil Nadu: This case held that any law placed in the Ninth Schedule after April 24, 1973, would be open to challenge on the ground that it violates the basic structure of the Constitution.
It was decided in 2007.
Step 2: Arrange the cases in chronological order.
The order of the years is 1973 (d), 1980 (b), 1981 (a), 2007 (c).
The correct sequence is d, b, a, c.