Three of these four statements are limitations courts actually apply when deciding legitimate expectation cases, and one is simply an inaccurate description of the doctrine, so the fastest way through this question is to separate genuine restrictions from a wrong claim.
Because it misdescribes the doctrine rather than limiting it, the only-procedural statement is the one that cannot be treated as a limitation, making Option A the correct choice.
The quickest way into this question is to notice that two of the four options say the exact same thing about reasonableness and fairness, which already tells us the doctrine's foundation is not what is being tested here, it is one of the other two statements.
That overstatement about enforceability is what makes it the untrue statement, so Option A is correct.
Tracing a legal doctrine to its origin is a matter of chronology and authorship, and here that means asking which judge first used the term.
Since the doctrine's name and first application trace back to 1969, Schmidt v. Secretary of State for Home Affairs is the case usually credited as its origin, making option B correct.
Judicial review of administrative discretion in India is usually organised around a small number of independent categories, so this question is really about which listed item does not deserve to stand as its own separate category.
Since it collapses into the abuse-of-discretion category instead of standing apart from it, failure to exercise discretion is the item that does not work as an independent ground, confirming Option A as the answer.
The empty formality theory is one of the more debated corners of natural justice law in India, and the key to this question is noticing how narrowly courts have actually allowed it to operate.
That qualified acceptance is what the correct option captures, making Option B the right choice.
Breaking the compound term into its two components is the fastest way to answer this one, since certiorarified mandamus is literally Certiorari plus Mandamus acting together.
That is exactly the combination option C describes, so Option C is correct.
The rule against excessive delegation only bites when essential legislative functions, laying down policy, are handed over, so this question is really testing that distinction between essential and non-essential functions.
Since delegating a non-essential function falls on the permitted side of that line rather than the invalidating side, it is the one option that is not a ground for invalidity, making Option A correct.
Matching a quoted legal test to its case is easiest when you recall what each option is actually known for.
Since the quoted test is the hallmark of the Kraipak judgment, Option A is correct.
Estoppel is fundamentally about protecting reliance, not about punishing bad intent, and keeping that distinction in mind resolves this question quickly.
Because proving bad intent has never been part of the test, that is the condition that is not essential, making Option D the correct answer.
Spotting the right ground in a fact-based question means matching the facts to the doctrine's core trigger rather than its label.
The scenario is a textbook legitimate expectation problem, so Option B is correct.